Screws
As the original Concrete screw anchor that revolutionized the construction world, Tapcon Concrete anchors deliver the ease of use, superior precision, and the unparalleled performance that professionals demand. Tapcon Concrete screw anchors draw from the unique ability to TAP threads into Concrete, making it an excellent alternative to expansion anchors, plugs, and lag shields. Use Tapcon Concrete screw anchors for installing sill plates, electrical equipment, furring strips, and many other applications that require fastening into brick, hollow block, or solid concrete.
- Tapcon concrete screws work in all masonry-based material including solid concrete, hollow block or brick
- Use Tapcon screws for a variety of projects including fixing sill plates, electrical equipment, 2 x 4 ft. and many other fixtures to masonry
- Chisel edges on Tapcon concrete screw anchor accurately cut threads into concrete allowing for consistent driving performance and back holding power
- Climaseal blue coating delivers long-lasting corrosion protection
- Advanced thread form reduces installation torque by 30%, allowing for use in a wider range of materials
- Reputation for quality, strength and ease of installation from industry professionals
- PROs choice for quality, strength and ease of installation
- Approved for use in ACQ treated lumber
- Includes a free carbide-tipped Tapcon drill bit
As the original Concrete screw anchor that revolutionized the construction world, Tapcon Concrete anchors deliver the ease of use, superior precision, and the unparalleled performance that professionals demand. Tapcon Concrete screw anchors draw from the unique ability to TAP threads into Concrete, making it an excellent alternative to expansion anchors, plugs, and lag shields. Use Tapcon Concrete screw anchors for installing sill plates, electrical equipment, furring strips, and many other applications that require fastening into brick, hollow block, or solid concrete.
- Tapcon concrete screws work in all masonry-based material including solid concrete, hollow block or brick
- Use Tapcon screws for a variety of projects including fixing sill plates, electrical equipment, 2 x 4 ft. and many other fixtures to masonry
- Chisel edges on Tapcon concrete screw anchor accurately cut threads into concrete allowing for consistent driving performance and back holding power
- Climaseal blue coating delivers long-lasting corrosion protection
- Advanced thread form reduces installation torque by 30%, allowing for use in a wider range of materials
- Reputation for quality, strength and ease of installation from industry professionals
- PROs choice for quality, strength and ease of installation
- Approved for use in ACQ treated lumber
- Includes a free carbide-tipped Tapcon drill bit
Has a rounded top surface and a flat bearing surface. Accepts standard flat blade screwdrivers. Machine screws have a uniform diameter the entire length of the shaft and are used to fasten machine components, appliances and more.
- Zinc plated
- Material: steel
- Sold in packs of 100
- Flat blade (slotted) screwdriver
- Pair with corresponding nut and washer in like finishes
- Common project applications: electronics, license plates, electrical boxes, switch plates, furniture
Has an indented top surface, 6-flat sides with a flat washer which project beyond the sides and provides a flat bearing surface. Accepts hex wrench. A tapping screw with spaced threads and a drill point which drills its own holes. All self drilling screws offer economical benefits, reduces labor and tooling costs, reduces or eliminates the need for drill and taps.
- Zinc plated
- Material: steel
- Sold in packs of 100
- 1/4 in. hex
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters, and register vents
Has a rounded top surface and a flat bearing surface. Combo Drive accepts Phillips and Standard Blade Screwdrivers. Often used when a fastener is expected to be driven and backed out several times.
- Zinc plated
- Material: steel
- Sold in packs of 100
- Use Phillips or standard blade screwdrivers
- Pair with corresponding nut and washer in like finishes
- Common project applications: electronics, license plates, electrical boxes, switch plates, furniture
A thread forming tapping screw with spaced threads and a gimlet point. Has an indented top surface, 6 flat sides with a flat washer which projects beyond the sides and provides a flat bearing surface. Accepts hex wrench. Slotted drive is added to make it easier to remove.
- Zinc plated
- Material: steel
- Sold in packs of 100
- 1/4 in. hex size
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters and register vents
A bugle head screw with spaced threads and a sharp point. For attaching drywall to wood or light gauge metal studs. Coarse thread for easy installation. Recommended for interior use.
- Black phosphate coated
- Material: steel
- Sold in 1 lb. boxes
- Coarse thread
Has an indented top surface, 6-flat sides with a flat washer which project beyond the sides and provides a flat bearing surface. Accepts hex wrench. A tapping screw with spaced threads and a drill point which drills its own holes. All self drilling screws offer economical benefits, reduces labor and tooling costs, reduces or eliminates the need for drill and taps.
- Zinc plated
- Material: steel
- Sold in packs of 100
- 5/16 in. hex
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters, and register vents
A thread forming tapping screw with spaced threads and a Gimlet Point. Pan heads have a gently rounded top and a flat Bearing Surface. Accepts Phillips and Standard Blade Screwdrivers.
- Zinc plated
- Material: steel
- Sold in packs of 100
- Use Phillips or standard blade screwdrivers
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters and register vents
A thread forming screw with a gimlet point, and coarse threads which produce a mating thread into wood. The countersunk head has a flat top and a head angle of approximately 82. Phillips drive provides good control in driving. Usually have an unthreaded portion of the shank at the head end of the screw.
- Zinc plated
- Material: steel
- Sold in packs of 100
- Phillips drive
- Common project applications: remodeling, fencing, storage, cabinets, framing
A thread forming tapping screw with spaced threads and a Gimlet Point. Pan heads have a gently rounded top and a flat Bearing Surface. Accepts Phillips and Standard Blade Screwdrivers.
- Zinc plated
- Material: steel
- Sold in packs of 100
- Use Phillips or standard blade screwdrivers
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters and register vents
A bugle head screw with spaced threads and a sharp point. For attaching drywall to wood or light gauge metal studs. Coarse thread for easy installation. Recommended for interior use.
- Black phosphate coated
- Material: steel
- Sold in 1 lb. boxes
- Coarse thread
A bugle head screw with spaced threads and a sharp point. For attaching drywall to wood or light gauge metal studs. Coarse thread for easy installation. Recommended for interior use.
- Black phos
- Material: steel
- Sold in packs of 100
- Coarse thread
A bugle head screw with spaced threads and a sharp point. For attaching drywall to wood or light gauge metal studs. Coarse thread for easy installation. Recommended for interior use.
- Black phosphate coated
- Material: steel
- Sold in 1 lb. boxes
- Coarse thread
A bugle head screw with spaced threads and a sharp point. For attaching drywall to wood or light gauge metal studs. Coarse thread for easy installation. Recommended for interior use.
- Black phosphate coated
- Material: steel
- Sold in 1 lb. boxes
- Coarse thread
Has an indented top surface, 6-flat sides with a flat washer which project beyond the sides and provides a flat bearing surface. Accepts hex wrench. A tapping screw with spaced threads and a drill point which drills its own holes. All self drilling screws offer economical benefits, reduces labor and tooling costs, reduces or eliminates the need for drill and taps.
- Zinc plated
- Material: steel
- Sold in packs of 100
- 1/4 in. hex
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters, and register vents
Sheet metal Screw or tapping Screw, are highly versatile and are used to attach metal, wood, fiberglass and plastic. The sharp threads draw material together and ensure a secure hold. Made from hardened steel, the threads create their own mating thread in pre-drilled holes. Sheet metal Screw is fully threaded with a sharp point.
- Zinc plated
- Pan head Phillips drive
- 295-pieces
- Pan head assortment
A tapping screw with spaced threads and a drill point which drills its own holes. Self-drilling screws offer economical benefits, reduces labor and tooling costs, reduces or eliminates the need for drill and taps. Pan heads have a gently rounded top and a flat bearing surface. Phillips is the most recommended drive type and provides good control in driving.
- Zinc plated
- Material: steel
- Sold in packs of 100
- Phillips drive
- Highly versitile
- Common project applications: roofing, HVAC, steel stud framing, gutters and register vents
As the original Concrete screw anchor that revolutionized the construction world, Tapcon Concrete anchors deliver the ease of use, superior precision, and the unparalleled performance that professionals demand. Tapcon Concrete screw anchors draw from the unique ability to TAP threads into Concrete, making it an excellent alternative to expansion anchors, plugs, and lag shields. Use Tapcon Concrete screw anchors for installing sill plates, electrical equipment, furring strips, and many other applications that require fastening into brick, hollow block, or solid concrete.
- Tapcon concrete screws work in all masonry-based material including solid concrete, hollow block or brick
- Use Tapcon screws for a variety of projects including fixing sill plates, electrical equipment, 2 x 4 ft. and many other fixtures to masonry
- Chisel edges on Tapcon concrete screw anchor accurately cut threads into concrete allowing for consistent driving performance and back holding power
- Climaseal blue coating delivers long-lasting corrosion protection
- Advanced thread form reduces installation torque by 30%, allowing for use in a wider range of materials
- Reputation for quality, strength and ease of installation from industry professionals
- PROs choice for quality, strength and ease of installation
- Approved for use in ACQ treated lumber
- Includes a free carbide-tipped Tapcon drill bit
Has an indented top surface, 6-flat sides with a flat washer which project beyond the sides and provides a flat bearing surface. Accepts hex wrench. A tapping screw with spaced threads and a drill point which drills its own holes. All self drilling screws offer economical benefits, reduces labor and tooling costs, reduces or eliminates the need for drill and taps.
- Zinc plated
- Material: steel
- Sold in packs of 100
- 5/16 in. hex
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters, and register vents
A thread forming tapping screw with spaced threads and a gimlet point. Has an indented top surface, 6 flat sides with a flat washer which projects beyond the sides and provides a flat bearing surface. Accepts hex wrench. Slotted drive is added to make it easier to remove.
- Zinc plated
- Material: steel
- Sold in packs of 100
- 5/16 in. hex size
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters and register vents
A bugle head screw with spaced threads and a sharp point. For attaching drywall to wood or light gauge metal studs. Coarse thread for easy installation. Recommended for interior use.
- Black phos
- Material: steel
- Sold in packs of 100
- Coarse thread
A thread forming tapping screw with spaced threads and a gimlet point. Has an indented top surface, 6 flat sides with a flat washer which projects beyond the sides and provides a flat bearing surface. Accepts hex wrench. Slotted drive is added to make it easier to remove.
- Zinc plated
- Material: steel
- Sold in packs of 100
- 1/4 in. hex size
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters and register vents
Has an indented top surface, 6-flat sides with a flat washer which project beyond the sides and provides a flat bearing surface. Accepts hex wrench. A tapping screw with spaced threads and a drill point which drills its own holes. All self drilling screws offer economical benefits, reduces labor and tooling costs, reduces or eliminates the need for drill and taps.
- Zinc plated
- Material: steel
- Sold in packs of 100
- 5/16 in. hex
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters, and register vents
A thread forming tapping screw with spaced threads and a Gimlet Point. Pan heads have a gently rounded top and a flat Bearing Surface. Accepts Phillips and Standard Blade Screwdrivers.
- Zinc plated
- Material: steel
- Sold in packs of 100
- Use Phillips or standard blade screwdrivers
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters and register vents
Teks #8 x 3/4 in. Zinc-Plated Steel Hex-Head Self-Tapping Drill-Point Screws (180-Pack) are ideal for attaching HVAC, electrical, metal framing, and general metal-to-metal applications for secure fastening and strong holding power. Teks screws provide secure metal-to-metal fastening and strong holding power without the need to pre-drill. Screws tap their own threads. Engineered drill point and flute allow for efficient material removal
- Teks Metal Fastening screws provide secure metal to metal fastening without the need to pre-drill and reduces cam-outs for high performance drive surfaces and recess
- Precise point designed to drill, tap and fasten all in 1 motion
- High performance drive surfaces reduce cam-outs to penetrate surface the first time for easy installation
- Zinc plated finish protects the job's appearance
- No slippage even with older sockets and worn bits
- No pre-drilling is necessary
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters and register vents
As the original Concrete screw anchor that revolutionized the construction world, Tapcon Concrete anchors deliver the ease of use, superior precision, and the unparalleled performance that professionals demand. Tapcon Concrete screw anchors draw from the unique ability to TAP threads into Concrete, making it an excellent alternative to expansion anchors, plugs, and lag shields. Use Tapcon Concrete screw anchors for installing sill plates, electrical equipment, furring strips, and many other applications that require fastening into brick, hollow block, or solid concrete.
- Tapcon concrete screws work in all masonry-based material including solid concrete, hollow block or brick
- Use Tapcon screws for a variety of projects including fixing sill plates, electrical equipment, 2 x 4 ft. and many other fixtures to masonry
- Chisel edges on Tapcon concrete screw anchor accurately cut threads into concrete allowing for consistent driving performance and back holding power
- Climaseal blue coating delivers long-lasting corrosion protection
- Advanced thread form reduces installation torque by 30%, allowing for use in a wider range of materials
- Reputation for quality, strength and ease of installation from industry professionals
- PROs choice for quality, strength and ease of installation
- Approved for use in ACQ treated lumber
- Includes a free 3/16 in. carbide-tipped Tapcon drill bit
Grip-Rite 158CDWS1 #6 x 1-5/8 in. #2 Phillips Bugle Head Coarse Thread Drywall Screws are a hand drive fastener rated for interior gypsum drywall applications. Coated in black phosphate for a smoother drive, corrosion resistance, and mud adhesion, these are the perfect screws to hang drywall on wood studs. These hard-working fasteners feature a sharp point and bugle head for efficiency and a smooth finish. Commonly used with Sheetrock and other top selling gypsum drywall brands, the #2 Phillips drive reduces the chance of damage to material during installation. Our coarse thread drywall screws are a construction industry staple for a reason! Sheetrock is a registered trademark of United States Gypsum Company.
- Used to attach gypsum drywall to wood studs
- Made from high strength steel for robust durability
- #6 x 1-5/8 in. drywall screws
- Sharp point and clearly defined threads for smooth installation
- Hand drive fastener for use in interior drywall applications
- #2 Phillips prevents overdriving and damage to drywall surface
- 1 lb. box with around 189 #6 x 1-5/8 in. drywall screws
A bugle head screw with spaced threads and a sharp point. For attaching drywall to wood or light gauge metal studs. Coarse thread for easy installation. Recommended for interior use.
- Black phos
- Material: steel
- Sold in packs of 100
- Coarse thread
These sheet metal screws or tapping screws, are highly versatile and are used to attach metal, wood, fiberglass and plastic. The sharp threads draw material together and ensure a secure hold. Made from hardened steel, the threads create their own mating thread in pre-drilled holes. Sheet metal screws are fully threaded with a sharp point.
- 20-pieces
- Zinc plated finish
- #10 x 1 in.
- Hex head
A thread forming tapping screw with spaced threads and a gimlet point. Has an indented top surface, 6 flat sides with a flat washer which projects beyond the sides and provides a flat bearing surface. Accepts hex wrench. Slotted drive is added to make it easier to remove.
- Zinc plated
- Material: steel
- Sold in packs of 100
- 5/16 in. hex size
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters and register vents
Make the most of you of your outdoor project with Deckmate brand exterior screws. Designed for use with all treated lumber and all exterior projects to connect wood to wood. A lifetime polymer coating provides extra corrosion resistance that is guaranteed for the life of your outdoor project.
- Star drive head helps transfer torque and prevent cam outs
- Nibs under head allow screw to countersink better for a smoother finish
- Type-17 point with flute creates its own pilot hole limiting the need for pre-drilling
- Includes T-25 driver bit in the box
Grip-Rite PTN158S1 PrimeGuard #8 x 1-5/8 in. #2 Phillips Bugle Head Coarse Thread Coated Exterior Screws feature a sharp point and 10-year coating for quality and value. Designed for exterior, wood to wood applications, the coarse threads reduce splitting and speed installation. Backed by a limited lifetime warranty, these screws are perfect for your weekend DIY projects.
- Used in general woodworking and construction applications
- Durable steel construction
- PrimeGuard coated for corrosion and rust resistance
- #8 x 1-5/8 in. screws designed for wood to wood construction
- #2 Phillips drive prevents over driving
- Nibs under head and sharp point provide maximum holding power
- 1 lb. box with around 153 #8 x 1-5/8 in. wood construction screws
Grip-Rite PTN2S1 PrimeGuard #8 x 2 in. #2 Phillips Bugle Head Coarse Thread Coated Exterior Screws feature a sharp point and 10-year coating for quality and value. Designed for exterior, wood to wood applications, the coarse threads reduce splitting and speed installation. Backed by a limited lifetime warranty, these screws are perfect for your weekend DIY projects.
- Used in general woodworking and construction applications
- Durable steel construction
- PrimeGuard coated for corrosion and rust resistance
- #8 x 2 in. screws designed for wood to wood construction
- #2 Phillips drive prevents over driving
- Nibs under head and sharp point provide maximum holding power
- 1 lb. box with around 129 #8 x 2 in. wood construction screws
As the original Concrete screw anchor that revolutionized the construction world, Tapcon Concrete anchors deliver the ease of use, superior precision, and the unparalleled performance that professionals demand. Tapcon Concrete screw anchors draw from the unique ability to TAP threads into Concrete, making it an excellent alternative to expansion anchors, plugs, and lag shields. Use Tapcon Concrete screw anchors for installing sill plates, electrical equipment, furring strips, and many other applications that require fastening into brick, hollow block, or solid concrete.
- Tapcon concrete screws work in all masonry-based material including solid concrete, hollow block or brick
- Use Tapcon screws for a variety of projects including fixing sill plates, electrical equipment, 2 x 4 ft. and many other fixtures to masonry
- Chisel edges on Tapcon concrete screw anchor accurately cut threads into concrete allowing for consistent driving performance and back holding power
- Climaseal blue coating delivers long-lasting corrosion protection
- Advanced thread form reduces installation torque by 30%, allowing for use in a wider range of materials
- Reputation for quality, strength and ease of installation from industry professionals
- PROs choice for quality, strength and ease of installation
- Approved for use in ACQ treated lumber
- Eliminates bit slip with star recess
A thread forming tapping screw with spaced threads and a gimlet point. Has an indented top surface, 6 flat sides with a flat washer which projects beyond the sides and provides a flat bearing surface. Accepts hex wrench. Slotted drive is added to make it easier to remove.
- Zinc plated
- Material: steel
- Sold in packs of 100
- 5/16 in. hex size
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters and register vents
A thread forming tapping screw with spaced threads and a gimlet point. Has an indented top surface, 6 flat sides with a flat washer which projects beyond the sides and provides a flat bearing surface. Accepts hex wrench. Slotted drive is added to make it easier to remove.
- Zinc plated
- Material: steel
- Sold in packs of 100
- 1/4 in. hex size
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters and register vents
Grip-Rite114CDW25BK #6 x 1-1/4 in. #2 Phillips Bugle Head Coarse Thread Drywall Screws are a hand drive fastener rated for interior gypsum drywall applications. Coated in black phosphate for a smoother drive, corrosion resistance, and mud adhesion, these are the perfect screws to hang drywall on wood studs. These hard-working fasteners feature a sharp point and bugle head for efficiency and a smooth finish. Commonly used with Sheetrock and other top selling gypsum drywall brands, the #2 Phillips drive reduces the chance of damage to material during installation. Our coarse thread drywall screws are a construction industry staple for a reason! Sheetrock is a registered trademark of United States Gypsum Company.
- Used to attach gypsum drywall to wood studs
- Made from steel for strength and durability
- #6 x 1-1/4 in. drywall screws
- Sharp point and clearly defined threads for smooth installation
- Hand drive fastener for use in interior drywall applications
- #2 Phillips prevents overdriving and damage to drywall surface
- 25 lb. bucket, approx. 5,952 #6 x 1-1/4 in. drywall screws
These sheet metal screws or tapping screws, are highly versatile and are used to attach metal, wood, fiberglass and plastic. The sharp threads draw material together and ensure a secure hold. Made from hardened steel, the threads create their own mating thread in pre-drilled holes. Sheet metal screws are fully threaded with a sharp point.
- 20-pieces
- Zinc plated finish
- 1/4 in. x 3/4 in.
- Hex head
Grip-Rite 3GS1 #8 x 3 in. #2 Phillips Bugle Head Coarse Thread Wood Screws feature a sharp point which makes driving fast and efficient. Designed for interior, wood to wood applications, the coarse auger threads reduce splitting and speed installation. Yellow zinc coating combats corrosion and adds an attractive color to wooden construction applications.
- Used for general woodworking and interior applications
- Durable steel construction
- Yellow zinc coating for an attractive finish
- #8 x 3 in. screws
- Nibs under drive head provide strong connection
- Coarse auger thread and sharp point mean less risk of splitting
- 1 lb. box with around 75 #8 x 3 in. wood screws
A Bugle Head Screw with Fine Thread and A Sharp Point. For Attaching Drywall To Light Gauge Metal Studs. Screws Can Be Installed With A Drill Or Electric Drywall Screw Gun.
- Black phos
- Material: steel
- Sold in packs of 100
- Fine thread
Has an indented top surface, 6-flat sides with a flat washer which project beyond the sides and provides a flat bearing surface. Accepts hex wrench. A tapping screw with spaced threads and a drill point which drills its own holes. All self drilling screws offer economical benefits, reduces labor and tooling costs, reduces or eliminates the need for drill and taps.
- Zinc plated
- Material: steel
- Sold in packs of 100
- 1/4 in. hex
- Highly versatile
- Common project applications: roofing, HVAC, steel stud framing, gutters, and register vents
Make the most of your of your outdoor project with DECKMATE brand exterior screws. Designed for use with all treated lumber and all exterior projects to connect wood to wood. A lifetime polymer coating provides extra corrosion resistance that is guaranteed for the life of your outdoor project.
- Star drive head helps transfer torque and prevent cam outs
- Nibs under head allow screw to countersink better for a smoother finish
- Type-17 point with flute creates its own pilot hole limiting the need for pre-drilling
- Includes T-25 driver bit in the box
Has a rounded top surface and a flat bearing surface. Combo Drive accepts Phillips and Standard Blade Screwdrivers. Often used when a fastener is expected to be driven and backed out several times.
- Zinc plated
- Material: steel
- Sold in packs of 100
- Use Phillips or standard blade screwdrivers
- Pair with corresponding nut and washer in like finishes
- Common project applications: electronics, license plates, electrical boxes, switch plates, furniture
Make the most of you of your outdoor project with Deckmate brand exterior screws. A patented thread designed for treated wood and all exterior material applications. A Lifetime polymer coating provides extra corrosion resistance for the fastener that is guaranteed for the life of your project.
- Star drive head helps transfer torque and prevent cam outs
- Nibs under head allow screw to countersink better for a smoother finish
- Type 17 point with flute creates its own pilot hole limiting the need for pre-drilling
- Includes T-25 driver bit in the box
Make the most of you of your outdoor project with DECKMATE brand exterior screws. Designed for use with all treated lumber and all exterior projects to connect wood to wood. A lifetime polymer coating provides extra corrosion resistance that is guaranteed for the life of your outdoor project.
- Star drive head helps transfer torque and prevent cam outs
- Nibs under head allow screw to countersink better for a smoother finish
- Type-17 point with flute creates its own pilot hole limiting the need for pre-drilling
- Includes T-25 driver bit in the box
Has A Rounded Top Surface and A Flat Bearing Surface. Combo Drive Accepts Phillips and Standard Blade Screwdrivers. Often Used When A Fastener Is Expected To Be Driven and Backed Out Several Times.
- Zinc plated
- Material: steel
- Sold in packs of 100
- Use Phillips or standard blade screwdrivers
- Pair with corresponding nut and washer in like finishes
- Common project applications: electronics, license plates, electrical boxes, switch plates, furniture
Coarse Thread For Easy Installation. Recommended For Exterior Use. Bugle Head Allows Screw To Depress The Wood Surface without Breaking It.
- Galvanized plating
- Material: steel
- Sold in 1 lb. boxes
- Galvanized coating protects against rust or corrosion