Internal Tooth Lock Washers

When vibration wants to back off your screws, internal tooth lock washers bite into the head and base metal to hold torque and help maintain electrical contact for grounding. The smooth outer edge installs clean without snagging. Choose zinc plated metric for everyday service or 410 stainless when you need magnetic corrosion resistance. We keep them ready to cut comebacks.

26 results

Internal Tooth Lock Washers

Metric Internal Tooth Lock Washers

410 Stainless Steel Internal Tooth Lock Washers

Internal Tooth Lock Washers

Bolt Size	Material	Finish	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
No. 6	Alloy Steel	Zinc Plated	100	374100	Log in to view price
#6 Internal Tooth Lock Washers - 100 Pack Item #: 374100 Package Weight: 0.1 lbs View Product Details Log in to Order
No. 8	Alloy Steel	Zinc Plated	100	374102	Log in to view price
#8 Internal Tooth Lock Washers - 100 Pack Item #: 374102 Package Weight: 0.1 lbs View Product Details Log in to Order
No. 10	Alloy Steel	Zinc Plated	100	374103	Log in to view price
#10 Internal Tooth Lock Washers - 100 Pack Item #: 374103 Package Weight: 0.1 lbs View Product Details Log in to Order
No. 12	Alloy Steel	Zinc Plated	100	374101	Log in to view price
#12 Internal Tooth Lock Washers - 100 Pack Item #: 374101 Package Weight: 0.1 lbs View Product Details Log in to Order
1/4"	Alloy Steel	Zinc Plated	100	374104	Log in to view price
1/4" Internal Tooth Lock Washers - 100 Pack Item #: 374104 Package Weight: 0.1 lbs View Product Details Log in to Order
5/16"	Alloy Steel	Zinc Plated	100	374105	Log in to view price
5/16" Internal Tooth Lock Washers - 100 Pack Item #: 374105 Package Weight: 0.2 lbs View Product Details Log in to Order
3/8"	Alloy Steel	Zinc Plated	100	374106	Log in to view price
3/8" Internal Tooth Lock Washers - 100 Pack Item #: 374106 Package Weight: 0.2 lbs View Product Details Log in to Order
7/16"	Alloy Steel	Zinc Plated	100	374107	Log in to view price
7/16" Internal Tooth Lock Washers - 100 Pack Item #: 374107 Package Weight: 0.3 lbs View Product Details Log in to Order
1/2"	Alloy Steel	Zinc Plated	100	374108	Log in to view price
1/2" Internal Tooth Lock Washers - 100 Pack Item #: 374108 Package Weight: 0.4 lbs View Product Details Log in to Order
9/16"	Alloy Steel	Zinc Plated	50	374109	Log in to view price
9/16" Internal Tooth Lock Washers - 50 Pack Item #: 374109 Package Weight: 0.2 lbs View Product Details Log in to Order
5/8"	Alloy Steel	Zinc Plated	50	374110	Log in to view price
5/8" Internal Tooth Lock Washers - 50 Pack Item #: 374110 Package Weight: 0.3 lbs View Product Details Log in to Order
3/4"	Alloy Steel	Zinc Plated	50	374112	Log in to view price
3/4" Internal Tooth Lock Washers - 50 Pack Item #: 374112 Package Weight: 0.3 lbs View Product Details Log in to Order

Metric Internal Tooth Lock Washers

Toothed washers bite into screw heads and fastened material to prevent loosening, providing greater vibration resistance compared to split lock washers. Their internal tooth design features a smooth outer edge that allows for easy installation without catching or snagging materials. Additionally, these washers are zinc plated for enhanced durability.

Bolt Size	Finish	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
M6	Zinc Plated	100	457106	Log in to view price
M6 Internal Tooth Washer - 100 Pack Item #: 457106 Package Weight: 0.1 lbs View Product Details Log in to Order
M8	Zinc Plated	100	457108	Log in to view price
M8 Internal Tooth Washer - 100 Pack Item #: 457108 Package Weight: 0.1 lbs View Product Details Log in to Order
M10	Zinc Plated	100	457110	Log in to view price
M10 Internal Tooth Washer - 100 Pack Item #: 457110 Package Weight: 0.2 lbs View Product Details Log in to Order
M12	Zinc Plated	100	457112	Log in to view price
M12 Internal Tooth Washer - 100 Pack Item #: 457112 Package Weight: 0.3 lbs View Product Details Log in to Order
M14	Zinc Plated	100	457114	Log in to view price
M14 Internal Tooth Washer - 100 Pack Item #: 457114 Package Weight: 0.4 lbs View Product Details Log in to Order
M16	Zinc Plated	100	457116	Log in to view price
M16 Internal Tooth Washer - 100 Pack Item #: 457116 Package Weight: 0.5 lbs View Product Details Log in to Order
M20	Zinc Plated	50	457120	Log in to view price
M20 Internal Tooth Washer - 50 Pack Item #: 457120 Package Weight: 0.5 lbs View Product Details Log in to Order

410 Stainless Steel Internal Tooth Lock Washers

To complete your assembly, check out our 18-8 Stainless Steel Hex Head Cap Screws. Made from 410 stainless steel, this stainless steel alloy is magnetic.

Bolt Size	Material	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
No. 6	410 Stainless Steel	100	338806	Log in to view price
#6 410 Stainless Steel Internal Tooth Lock Washer - 100 Pack Item #: 338806 Package Weight: 0.1 lbs View Product Details Log in to Order
No. 8	410 Stainless Steel	100	338808	Log in to view price
#8 410 Stainless Steel Internal Tooth Lock Washer - 100 Pack Item #: 338808 Package Weight: 0.1 lbs View Product Details Log in to Order
No. 10	410 Stainless Steel	100	338810	Log in to view price
#10 410 Stainless Steel Internal Tooth Lock Washer - 100 Pack Item #: 338810 Package Weight: 0.1 lbs View Product Details Log in to Order
No. 12	410 Stainless Steel	100	338812	Log in to view price
#12 410 Stainless Steel Internal Tooth Lock Washer - 100 Pack Item #: 338812 Package Weight: 0.1 lbs View Product Details Log in to Order
1/4"	410 Stainless Steel	100	338840	Log in to view price
1/4" 410 Stainless Steel Internal Tooth Lock Washer - 100 Pack Item #: 338840 Package Weight: 0.1 lbs View Product Details Log in to Order
5/16"	410 Stainless Steel	100	338850	Log in to view price
5/16" 410 Stainless Steel Internal Tooth Lock Washer - 100 Pack Item #: 338850 Package Weight: 0.2 lbs View Product Details Log in to Order
3/8"	410 Stainless Steel	100	338860	Log in to view price
3/8" 410 Stainless Steel Internal Tooth Lock Washer - 100 Pack Item #: 338860 Package Weight: 0.2 lbs View Product Details Log in to Order