A coiled, hardened, split circular washer with a slightly trapezoidal wire section. The tension generated by the deflection of the regular helical spring lock washer meets the needs of most commercial applications. It is, therefore, the most popular type of helical spring lock washer in terms of usage and production.

• Zinc plated
• Material: steel
• Sold in packs of 100
• Regular series

Prime LineMedium Split Lock Washers, Grd 18-8 Ss, Package Of 50. Size: 3/8 Inch. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Asme B18.21.1. Mfg #9082267

• Size: 3/8 Inch
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

SAE flat washers have slightly smaller inside and outside diameters as compared to USS flat washers. Most SAE washers are made from thinner material. SAE flat washers are designed for assembly around a bolt or screw, between the bearing surface of the fastener and the part to which it is attached. Split lock washers are coiled, hardened, split circular washers with a slightly trapezoidal wire section. The tension generated by the deflection of the regular helical spring lock washer meets the needs of most commercial applications.

• Assortment contains the following sizes and quantities of SAE flat washers zinc plated: 1/4 50 pcs 5/16 35 pcs 3/8 25 pcs 7/16 15 pcs 1/2 10 pcs 5/8 5 pcs
• Assortment contains the following sizes and quantities of split lock washers zinc plated: 1/4 50-pieces 5/16 35-pieces 3/8 25-pieces 7/16 15-pieces 1/2 10-pieces 5/8 5-pieces
• Material: steel zinc plated
• Clear plastic carrying case for easy storage

Internal and external tooth lock washers are designed to prevent a nut or bolt head from loosening with the strut action set up by the teeth. The teeth also absorb shock and vibration. The teeth also slightly scrape the grounding surface when used in grounding applications to improve the electrical connection.

• Assortment contains the following sizes and quantities of external tooth lock washers zinc plated: #6 50 pcs #8 50 pcs #10 50 pcs 1/4 50 pcs 5/16 35 pcs 3/8 25 pcs
• Assortment contains the following sizes and quantities of internal tooth lock washers zinc plated: #6 50 pcs #8 50 pcs #10 50 pcs 1/4 50 pcs 5/16 35 pcs 3/8 25-pieces
• Material: steel zinc plated
• Clear plastic carrying case for easy storage

Prime Line External Tooth Lock Washers,400 Series Ss, Package Of 25. Size: 1/4 Inch. Features Teeth That Extend Outward. Prevents Loosening Of Bolt Or Nut By Biting Into Surface When Nut Is Tightened Down. Best To Use Bolts With Large Heads To Ensure Teeth Make Full Contact. Can Be Used On Screws And Bolts. Specification(S) Met: Asme B18.21.1 Ty A. Mfg #9083222

• Size: 1/4 Inch
• Features Teeth That Extend Outward
• Prevents Loosening Of Bolt Or Nut By Biting Into Surface When Nut Is Tightened Down
• Best To Use Bolts With Large Heads To Ensure Teeth Make Full Contact.

Prime Line Med Split Lock Washers,Grade 18-8 Ss, Package Of 50. Size: 5/16 Inch. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Asme B18.21.1. Mfg #9082172

• Size: 5/16 Inch
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Medium Split Lock Washers, Grd 18-8 Ss, Package Of 50. Size: 1/4 Inch. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Asme B18.21.1. Mfg #9082077

• Size: 1/4 Inch
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Lock Washers, Internal Tooth , Zinc, Package Of 50. Size: #6. Features Teeth That Extend Inward. Prevents Loosening Of Bolt Or Nut By Biting Into Surface. Best To Use On Bolts Or Screws With Smaller Heads. Preferable Over External Tooth Lock Washers In Cases Where Teeth Need To Be Hidden. Specification(S) Met: Asme B18.21.1 Type A. Mfg #9082628

• Size: #6
• Features Teeth That Extend Inward
• Prevents Loosening Of Bolt Or Nut By Biting Into Surface
• Best To Use On Bolts Or Screws With Smaller Heads

Prime Line Medium Split Lock Washers, Zc, Package Of 100. Size: 5/16 Inch. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Asme B18.21.1 & Sae J403. Mfg #9082134

• Size: 5/16 Inch
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Med Split Lock Washers, Met, M8, Zc Stl, Package Of 25. Size: M8. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Din 127 Type B, Iso 12683 Type 1. Mfg #9119507

• Size: M8
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Medium Split Lock Washers, Ss. Size: M3. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Din 127 Type B. Mfg #9119416

• Size: M3
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Shcs, Hdr, #8-32 X 5/8 In, Blk Sl,Package Of 25. Size: 5/8 Inch. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Asme B18.21.1 & Sae J403. Mfg #9082421

• Size: 5/8 Inch
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Medium Split Lock Washers, Hot Dip Galv Stl, Package Of 10. Size: 3/4 Inch. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Asme B18.21.1 & Sae J403. Mfg #9082448

• Size: 3/4 Inch
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Internal Tooth Lock Washers, 1/4 In, 400 Series Ss, Package Of 25. Size: 1/4 Inch. Features Teeth That Extend Inward. Prevents Loosening Of Bolt Or Nut By Biting Into Surface. Best To Use On Bolts Or Screws With Smaller Heads. Preferable Over External Tooth Lock Washers In Cases Where Teeth Need To Be Hidden. Specification(S) Met: Asme B18.21.1 Ty A. Mfg #9082766

• Size: 1/4 Inch
• Features Teeth That Extend Inward
• Prevents Loosening Of Bolt Or Nut By Biting Into Surface
• Best To Use On Bolts Or Screws With Smaller Heads

Prime Line Lock Washers, External Tooth, #8,Zinc. Size: #8. Features Teeth That Extend Outward. Prevents Loosening Of Bolt Or Nut By Biting Into Surface When Nut Is Tightened Down. Best To Use Bolts With Large Heads To Ensure Teeth Make Full Contact. Can Be Used On Screws And Bolts. Specification(S) Met: Asme B18.21.1 Type A. Mfg #9083103

• Size: #8
• Features Teeth That Extend Outward
• Prevents Loosening Of Bolt Or Nut By Biting Into Surface When Nut Is Tightened Down
• Best To Use Bolts With Large Heads To Ensure Teeth Make Full Contact.

Prime Line Lock Washers, Eternal Tooth, Zinc, Package Of 50. Size: 1/4 Inch. Features Teeth That Extend Outward. Prevents Loosening Of Bolt Or Nut By Biting Into Surface When Nut Is Tightened Down. Best To Use Bolts With Large Heads To Ensure Teeth Make Full Contact. Can Be Used On Screws And Bolts. Specification(S) Met: Asme B18.21.1 Type A. Mfg #9083217

• Size: 1/4 Inch
• Features Teeth That Extend Outward
• Prevents Loosening Of Bolt Or Nut By Biting Into Surface When Nut Is Tightened Down
• Best To Use Bolts With Large Heads To Ensure Teeth Make Full Contact.

Prime Line Med Split Lock Washers,Grade 8 Yw Zc Stl, Package Of 25. Size: 1/4 Inch. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Asme B18.21.1 & Astm B695. Mfg #9119184

• Size: 1/4 Inch
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Medium Split Lock Washers, 1/4 In, Grd 18-8 Ss, Package Of 25. Size: 1/4 Inch. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Asme B18.21.1. Mfg #9082058

• Size: 1/4 Inch
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Medium Split Lock Washers, Grd 18-8 Ss, Package Of 20. Size: 5/16 Inch. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Asme B18.21.1. Mfg #9082153

• Size: 5/16 Inch
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Lock Washers, External Tooth,Zinc0. Size: 1/2 Inch. Features Teeth That Extend Outward. Prevents Loosening Of Bolt Or Nut By Biting Into Surface When Nut Is Tightened Down. Best To Use Bolts With Large Heads To Ensure Teeth Make Full Contact. Can Be Used On Screws And Bolts. Specification(S) Met: Asme B18.21.1 Type A. Mfg #9083293

• Size: 1/2 Inch
• Features Teeth That Extend Outward
• Prevents Loosening Of Bolt Or Nut By Biting Into Surface When Nut Is Tightened Down
• Best To Use Bolts With Large Heads To Ensure Teeth Make Full Contact.

Prime Line Med Split Lock Washers, Grade 18-8 Ss, Package Of 20. Size: 3/8 Inch. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Asme B18.21.1. Mfg #9082248

• Size: 3/8 Inch
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Lock Washers, External Tooth, Zc, Package Of 50. Size: 3/8 Inch. Features Teeth That Extend Outward. Prevents Loosening Of Bolt Or Nut By Biting Into Surface When Nut Is Tightened Down. Best To Use Bolts With Large Heads To Ensure Teeth Make Full Contact. Can Be Used On Screws And Bolts. Specification(S) Met: Asme B18.21.1 Type A. Mfg #9083257

• Size: 3/8 Inch
• Features Teeth That Extend Outward
• Prevents Loosening Of Bolt Or Nut By Biting Into Surface When Nut Is Tightened Down
• Best To Use Bolts With Large Heads To Ensure Teeth Make Full Contact.

Prime Line Med Split Lock Washers, 9/16 In., Zc Stl, Package Of 25. Size: 9/16 Inch. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Asme B18.21.1 & Sae J403. Mfg #9082400

• Size: 9/16 Inch
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Lock Washers, Internal Tooth, Zinc, Package Of 25. Size: 1/2 Inch. Features Teeth That Extend Inward. Prevents Loosening Of Bolt Or Nut By Biting Into Surface. Best To Use On Bolts Or Screws With Smaller Heads. Preferable Over External Tooth Lock Washers In Cases Where Teeth Need To Be Hidden. Specification(S) Met: Asme B18.21.1 Type A. Mfg #9082839

• Size: 1/2 Inch
• Features Teeth That Extend Inward
• Prevents Loosening Of Bolt Or Nut By Biting Into Surface
• Best To Use On Bolts Or Screws With Smaller Heads

Prime LineMedium Split Lock Washers, Ss, Package Of 10. Size: M6. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Din 127 Type B. Mfg #9119473

• Size: M6
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Medium Split Lock Washers, 5/8 In, Ss. Size: 5/8 Inch. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Asme B18.21.1. Mfg #9082424

• Size: 5/8 Inch
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Medium Split Lock Washers, 1/2 In, Grd 18-8 Ss, Package Of 25. Size: 1/2 Inch. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Asme B18.21.1. Mfg #9082364

• Size: 1/2 Inch
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Medium Split Lock Washers, M7, Zinc, Package Of 25. Size: M7. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Din 127 Type B, Iso 12683 Type 1. Mfg #9119488

• Size: M7
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Medium Split Lock Washers, Hot Dip Galvan Steel, Package Of 50. Size: 3/8 Inch. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Asme B18.21.1 & Sae J403. Mfg #9082286

• Size: 3/8 Inch
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Medium Split Lock Washers, M5, Zinc, Package Of 25. Size: M5. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Din 127 Type B, Iso 12683 Type 1. Mfg #9119450

• Size: M5
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

USS flat washers are designed for assembly around a bolt or screw, between the bearing surface of the fastener and the part to which it is attached. Flat washers are used to improve stress distribution, and to span large clearance holes. Split lock washers are coiled, hardened, split circular washers with a slightly trapezoidal wire section. The tension generated by the deflection of the regular helical spring lock washer meets the needs of most commercial applications.

• Assortment contains the following sizes and quantities of USS flat washers zinc plated: 1/4 50 pcs 5/16 35 pcs 3/8 25 pcs 7/16 15 pcs 1/2 10 pcs 5/8 5 pcs
• Assortment contains the following sizes and quantities of split lock washers zinc plated: 1/4 50-pieces 5/16 35-pieces 3/8 25-pieces 7/16 15-pieces 1/2 10-pieces 5/8 5 pcs
• Material: steel zinc plated
• Clear plastic carrying case for easy storage

Prime Line Medium Split Lock Washers,M4, Zc, Package Of 25. Size: M4. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Din 127 Type B, Iso 12683 Type 1. Mfg #9119431

• Size: M4
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Internal Tooth Lock Washers, #10, 400 Series Ss. Size: #10. Features Teeth That Extend Inward. Prevents Loosening Of Bolt Or Nut By Biting Into Surface. Best To Use On Bolts Or Screws With Smaller Heads. Preferable Over External Tooth Lock Washers In Cases Where Teeth Need To Be Hidden. Specification(S) Met: Asme B18.21.1 Ty A. Mfg #9082671

• Size: #10
• Features Teeth That Extend Inward
• Prevents Loosening Of Bolt Or Nut By Biting Into Surface
• Best To Use On Bolts Or Screws With Smaller Heads

Prime Line External Tooth Lock Washers,400 Series Ss. Size: 3/8 Inch. Features Teeth That Extend Outward. Prevents Loosening Of Bolt Or Nut By Biting Into Surface When Nut Is Tightened Down. Best To Use Bolts With Large Heads To Ensure Teeth Make Full Contact. Can Be Used On Screws And Bolts. Specification(S) Met: Asme B18.21.1 Ty A. Mfg #9083260

• Size: 3/8 Inch
• Features Teeth That Extend Outward
• Prevents Loosening Of Bolt Or Nut By Biting Into Surface When Nut Is Tightened Down
• Best To Use Bolts With Large Heads To Ensure Teeth Make Full Contact.

Prime Line Medium Split Lock Washers, Zinc, Package Of 100. Size: 1/4 Inch. Round Washer With A Split And Helical Shape. When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface. Provides A Spring Tension Force That Adds Additional Friction. Helps To Prevent Nuts From Loosening In Cases Where It May Be Subject To Vibration, In Some Applications A Flat Washer Is Used With The Split Lock Washer. Specification(S) Met: Asme B18.21.1 & Sae J403. Mfg #9082039

• Size: 1/4 Inch
• Round Washer With A Split And Helical Shape
• When Fully Fastened, The Edges At The Split Bite Into The Nut And Material Surface
• Provides A Spring Tension Force That Adds Additional Friction

Prime Line Lock Washers, External Tooth, 5/16 In, Zc Sl, Package Of 25. Size: 5/16 Inch. Features Teeth That Extend Outward. Prevents Loosening Of Bolt Or Nut By Biting Into Surface When Nut Is Tightened Down. Best To Use Bolts With Large Heads To Ensure Teeth Make Full Contact. Can Be Used On Screws And Bolts. Specification(S) Met: Asme B18.21.1 Type A. Mfg #9083236

• Size: 5/16 Inch
• Features Teeth That Extend Outward
• Prevents Loosening Of Bolt Or Nut By Biting Into Surface When Nut Is Tightened Down
• Best To Use Bolts With Large Heads To Ensure Teeth Make Full Contact.