Internal-Tooth Lock Washers

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Internal

Internal and External

System of Measurement

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Rockwell C40 to Rockwell C50

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DFARS Specialty Metals

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EAR99

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Container Length

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215 Products

Washer Type

Domed

Spread pressure over a large area to limit damage to material

6 products

Performance

Corrosion Resistant

Won't rust in wet and outdoor environments

123 products

Performance

High Strength

Withstand heavy loads and high stress without deforming

6 products

Wear Resistant

Won't lose strength, even on rotating parts with lots of friction

46 products

Tooth Lock Washers

Grip tighter than split lock washers to prevent nuts and screws from loosening in applications with constant movement, such as conveyors. Tooth lock washers typically can't be reused because the teeth often get bent when tightened.

Internal Tooth

Internal teeth dig into the nut or screw to prevent it from backing out. Unlike external-tooth lock washers, these have a smooth outside edge, so they are less likely to mar your material or snag on objects. However, they don’t grip quite as well. Pair them with fasteners that have small diameters, such as fillister and cheese head screws.

18-8 Stainless Steel—The choice for wet and outdoor environments, these washers won't rust when exposed to moisture. However, they can't hold up to the harsh chemicals that 316 stainless steel can.

Highly-Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these washers won't degrade when exposed to harsh weather, salt water, and most chemicals.

Wear-Resistant 400 Series Stainless Steel—These grip hard material better than other types of stainless steel. They are not as corrosion resistant as 18-8 and 316 stainless steel, so they are best for environments that experience occasional moisture.

Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.

Black-Oxide Steel—Typically chosen for their appearance, these washers have a dark, matte coating that creates a finished look. They offer minimal corrosion resistance, so they're best for dry environments.

Highly-Corrosion-Resistant Phosphor Bronze—Stronger and more wear resistant than silicon bronze, but with the same excellent corrosion resistance. These washers won't rust or deteriorate when submerged in salt water, so they're a good fit for marine environments.

	For Screw Size	ID	OD	Thk.	For Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel



		No. 4	0.115"	0.270"	0.012" to 0.018"	—	ASME B18.21.1	100	000000000	00000


		No. 6	0.141"	0.295"	0.016" to 0.022"	—	ASME B18.21.1	100	000000000	0000
		No. 8	0.168"	0.340"	0.018" to 0.023"	—	ASME B18.21.1	100	000000000	0000
		No. 10	0.195"	0.381"	0.018" to 0.024"	—	ASME B18.21.1	100	000000000	0000
		No. 12	0.231"	0.410"	0.020" to 0.027"	—	ASME B18.21.1	100	000000000	0000
		1/4"	0.256"	0.478"	0.023" to 0.028"	—	ASME B18.21.1	100	000000000	0000
		5/16"	0.320"	0.610"	0.028" to 0.034"	—	ASME B18.21.1	50	000000000	0000
		3/8"	0.384"	0.692"	0.032" to 0.040"	—	ASME B18.21.1	25	000000000	0000
		1/2"	0.512"	0.900"	0.037" to 0.045"	—	ASME B18.21.1	10	000000000	0000
		9/16"	0.576"	0.985"	0.037" to 0.045"	—	ASME B18.21.1	10	000000000	0000
		5/8"	0.640"	1.071"	0.042" to 0.050"	—	ASME B18.21.1	10	000000000	0000


		3/4"	0.769"	1.245"	0.047" to 0.055"	—	ASME B18.21.1	5	000000000	0000
		M2	2.2 mm	4.5 mm	0.2 mm to 0.4 mm	—	DIN 6797	100	000000000	0000
		M2.3	2.5 mm	5.0 mm	0.2 mm to 0.4 mm	—	DIN 6797	100	000000000	0000
		M2.5	2.7 mm	5.5 mm	0.2 mm to 0.5 mm	—	DIN 6797	100	000000000	0000
		M3	3.2 mm	6.0 mm	0.3 mm to 0.5 mm	—	DIN 6797	100	000000000	0000
		M3.5	3.7 mm	7.0 mm	0.4 mm to 0.6 mm	—	DIN 6797	100	000000000	0000
		M4	4.3 mm	8.0 mm	0.4 mm to 0.6 mm	—	DIN 6797	100	000000000	0000
		M5	5.3 mm	10.0 mm	0.5 mm to 0.7 mm	—	DIN 6797	100	000000000	0000
		M6	6.4 mm	11.0 mm	0.6 mm to 0.8 mm	—	DIN 6797	100	000000000	0000
		M7	7.4 mm	12.5 mm	0.7 mm to 0.9 mm	—	DIN 6797	50	000000000	00000


		M8	8.4 mm	15.0 mm	0.7 mm to 0.9 mm	—	DIN 6797	100	000000000	0000
		M10	10.5 mm	18.0 mm	0.8 mm to 1.0 mm	—	DIN 6797	50	000000000	0000
		M12	13.0 mm	20.5 mm	0.9 mm to 1.2 mm	—	DIN 6797	50	000000000	0000
		M14	15.0 mm	24.0 mm	0.9 mm to 1.2 mm	—	DIN 6797	25	000000000	0000
		M16	17.0 mm	26.0 mm	1.0 mm to 1.4 mm	—	DIN 6797	25	000000000	0000
		M18	19.0 mm	30.0 mm	1.2 mm to 1.5 mm	—	DIN 6797	10	000000000	0000
		M20	21.0 mm	33.0 mm	1.2 mm to 1.5 mm	—	DIN 6797	10	000000000	0000
		M22	23.0 mm	36.0 mm	1.3 mm to 1.6 mm	—	DIN 6797	10	000000000	0000
		M24	25.0 mm	38.0 mm	1.3 mm to 1.6 mm	—	DIN 6797	10	000000000	00000


		Highly-Corrosion-Resistant 316 Stainless Steel



				No. 4	0.115"	0.270"	0.012" to 0.018"	—	ASME B18.21.1	5	000000000	0000


				No. 6	0.141"	0.295"	0.016" to 0.022"	—	ASME B18.21.1	5	000000000	0000
				No. 8	0.168"	0.340"	0.018" to 0.023"	—	ASME B18.21.1	5	000000000	0000
				No. 10	0.195"	0.381"	0.018" to 0.024"	—	ASME B18.21.1	5	000000000	0000
				1/4"	0.256"	0.478"	0.023" to 0.028"	—	ASME B18.21.1	5	000000000	0000
				5/16"	0.320"	0.610"	0.028" to 0.034"	—	ASME B18.21.1	5	000000000	0000
				3/8"	0.384"	0.692"	0.032" to 0.040"	—	ASME B18.21.1	5	000000000	0000
				1/2"	0.530"	0.867"	0.037" to 0.045"	—	ASME B18.21.1	5	000000000	0000


				Wear-Resistant 400 Series Stainless Steel



						No. 2	0.089"	0.200"	0.010" to 0.016"	—	ASME B18.21.1	100	000000000	0000


No. 2						0.095"	0.200"	0.010" to 0.016"	—	ASME B18.21.1	1,000	000000000	00000
No. 3	0.102"					0.232"	0.010" to 0.016"	—	ASME B18.21.1	100	000000000	0000
No. 4	0.115"					0.270"	0.012" to 0.018"	—	ASME B18.21.1	100	000000000	0000
No. 4	0.123"					0.270"	0.012" to 0.018"	—	ASME B18.21.1	1,000	000000000	00000
No. 5	0.136"					0.280"	0.014" to 0.020"	—	ASME B18.21.1	100	000000000	0000
No. 5	0.136"					0.280"	0.014" to 0.020"	—	ASME B18.21.1	1,000	000000000	00000
No. 6	0.141"					0.295"	0.016" to 0.022"	—	ASME B18.21.1	100	000000000	0000
No. 6	0.150"					0.295"	0.016" to 0.022"	—	ASME B18.21.1	1,000	000000000	00000
No. 8	0.168"					0.340"	0.018" to 0.023"	—	ASME B18.21.1	100	000000000	0000
No. 9	0.176"					0.340"	0.018" to 0.023"	—	ASME B18.21.1	1,000	000000000	00000


No. 10	0.195"					0.381"	0.018" to 0.024"	—	ASME B18.21.1	100	000000000	0000
No. 10	0.204"					0.381"	0.018" to 0.024"	—	ASME B18.21.1	1,000	000000000	00000
No. 12	0.221"					0.410"	0.020" to 0.027"	—	ASME B18.21.1	100	000000000	0000
1/4"	0.256"					0.478"	0.023" to 0.028"	—	ASME B18.21.1	100	000000000	0000
1/4"	0.267"					0.478"	0.023" to 0.028"	—	ASME B18.21.1	1,000	000000000	00000
5/16"	0.320"					0.610"	0.028" to 0.034"	—	ASME B18.21.1	100	000000000	0000
3/8"	0.384"					0.692"	0.032" to 0.040"	—	ASME B18.21.1	100	000000000	0000
7/16"	0.448"					0.789"	0.032" to 0.040"	—	ASME B18.21.1	100	000000000	00000
1/2"	0.512"					0.900"	0.037" to 0.045"	—	ASME B18.21.1	50	000000000	0000
9/16"	0.576"					0.985"	0.037" to 0.045"	—	ASME B18.21.1	50	000000000	00000


5/8"	0.640"					1.071"	0.042" to 0.050"	—	ASME B18.21.1	25	000000000	00000
3/4"	0.769"					1.245"	0.047" to 0.055"	—	ASME B18.21.1	25	000000000	00000
7/8"	0.927"					1.410"	0.052" to 0.060"	—	ASME B18.21.1	5	000000000	0000
1"	1.060"					1.640"	0.059" to 0.067"	—	ASME B18.21.1	5	000000000	0000


Zinc-Plated Steel



						No. 2	0.089"	0.200"	0.010" to 0.016"	—	ASME B18.21.1	100	000000000	0000


						No. 3	0.102"	0.232"	0.010" to 0.016"	—	ASME B18.21.1	100	000000000	0000
						No. 4	0.115"	0.270"	0.012" to 0.018"	—	ASME B18.21.1	100	000000000	0000
						No. 5	0.129"	0.280"	0.014" to 0.020"	—	ASME B18.21.1	100	000000000	0000
						No. 6	0.141"	0.295"	0.016" to 0.022"	—	ASME B18.21.1	100	000000000	0000
						No. 8	0.168"	0.340"	0.018" to 0.023"	—	ASME B18.21.1	100	000000000	0000
						No. 10	0.195"	0.381"	0.018" to 0.024"	—	ASME B18.21.1	100	000000000	0000
		No. 12				0.221"	0.410"	0.020" to 0.027"	—	ASME B18.21.1	100	000000000	0000
		1/4"	0.256"			0.478"	0.023" to 0.028"	—	ASME B18.21.1	100	000000000	0000
		1/4"	0.256"			0.536"	0.034" to 0.044"	SAE Grade 8	ASME B18.21.1	100	000000000	00000
		5/16"	0.320"			0.607"	0.028" to 0.034"	—	ASME B18.21.1	50	000000000	0000


		5/16"	0.320"			0.607"	0.040" to 0.050"	SAE Grade 8	ASME B18.21.1	50	000000000	00000
		3/8"	0.384"			0.681"	0.032" to 0.040"	—	ASME B18.21.1	50	000000000	0000
		3/8"	0.384"			0.747"	0.040" to 0.050"	SAE Grade 8	ASME B18.21.1	25	000000000	00000
		7/16"	0.448"			0.764"	0.032" to 0.040"	—	ASME B18.21.1	50	000000000	0000
		1/2"	0.512"			0.883"	0.037" to 0.045"	—	ASME B18.21.1	50	000000000	0000
		1/2"	0.512"			0.923"	0.054" to 0.070"	SAE Grade 8	ASME B18.21.1	10	000000000	00000
		9/16"	0.576"			0.985"	0.037" to 0.045"	—	ASME B18.21.1	50	000000000	0000
		5/8"	0.640"			1.071"	0.042" to 0.050"	—	ASME B18.21.1	50	000000000	00000
		5/8"	0.640"			1.134"	0.054" to 0.070"	SAE Grade 8	ASME B18.21.1	5	000000000	00000
		3/4"	0.769"			1.245"	0.047" to 0.055"	—	ASME B18.21.1	25	000000000	0000


		3/4"	0.769"	1.260"	0.073" to 0.083"	SAE Grade 8	ASME B18.21.1	5	000000000	00000
		7/8"	0.894"	1.410"	0.052" to 0.060"	—	ASME B18.21.1	25	000000000	00000
		1"	1.019"	1.613"	0.059" to 0.067"	—	ASME B18.21.1	10	000000000	0000
		1 1/8"	1.144"	1.830"	0.059" to 0.067"	—	ASME B18.21.1	10	000000000	00000
		1 1/4"	1.275"	1.975"	0.059" to 0.067"	—	ASME B18.21.1	5	000000000	00000
		1 3/8"	1.394"	1.950"	0.060" to 0.064"	—	ASME B18.21.1	1	000000000	0000
		1 1/2"	1.500"	2.515"	0.076" to 0.080"	—	ASME B18.21.1	1	000000000	0000
		M2	2.2 mm	4.5 mm	0.2 mm to 0.4 mm	—	DIN 6797	100	000000000	0000
		M2.5	2.7 mm	5.5 mm	0.2 mm to 0.5 mm	—	DIN 6797	100	000000000	0000
		M3	3.2 mm	6.0 mm	0.3 mm to 0.5 mm	—	DIN 6797	100	000000000	0000


		M3.5	3.7 mm	7.0 mm	0.4 mm to 0.6 mm	—	DIN 6797	100	000000000	0000
		M4	4.3 mm	8.0 mm	0.4 mm to 0.6 mm	—	DIN 6797	100	000000000	0000
		M5	5.3 mm	10.0 mm	0.5 mm to 0.7 mm	—	DIN 6797	100	000000000	0000
		M6	6.4 mm	11.0 mm	0.6 mm to 0.8 mm	—	DIN 6797	100	000000000	0000
		M7	7.4 mm	12.5 mm	0.7 mm to 0.9 mm	—	DIN 6797	100	000000000	0000
		M8	8.4 mm	15.0 mm	0.7 mm to 0.9 mm	—	DIN 6797	100	000000000	0000
		M10	10.5 mm	18.0 mm	0.8 mm to 1.0 mm	—	DIN 6797	50	000000000	0000
		M12	13.0 mm	20.5 mm	0.9 mm to 1.2 mm	—	DIN 6797	50	000000000	00000
		M14	15.0 mm	24.0 mm	0.9 mm to 1.2 mm	—	DIN 6797	25	000000000	0000
		M16	17.0 mm	26.0 mm	1.0 mm to 1.4 mm	—	DIN 6797	25	000000000	0000


		M18	19.0 mm	30.0 mm	1.2 mm to 1.5 mm	—	DIN 6797	10	000000000	0000
		M20	21.0 mm	33.0 mm	1.2 mm to 1.5 mm	—	DIN 6797	10	000000000	00000
		M24	25.0 mm	38.0 mm	1.3 mm to 1.6 mm	—	DIN 6797	10	000000000	00000


		Black-Oxide Steel



				M2	2.2 mm	4.5 mm	0.2 mm to 0.4 mm	—	DIN 6797	100	000000000	0000


M2.5	2.7 mm			5.5 mm	0.2 mm to 0.5 mm	—	DIN 6797	100	000000000	0000
M2.6	2.8 mm			5.5 mm	0.3 mm to 0.5 mm	—	DIN 6797	100	000000000	0000
M3	3.2 mm			6.0 mm	0.3 mm to 0.5 mm	—	DIN 6797	100	000000000	0000
M3.5	3.7 mm			7.0 mm	0.4 mm to 0.6 mm	—	DIN 6797	100	000000000	0000
M4	4.3 mm			8.0 mm	0.4 mm to 0.6 mm	—	DIN 6797	100	000000000	0000
M5	5.3 mm			10.0 mm	0.5 mm to 0.7 mm	—	DIN 6797	100	000000000	0000
M6	6.4 mm			11.0 mm	0.6 mm to 0.8 mm	—	DIN 6797	100	000000000	0000
M8	8.4 mm			15.0 mm	0.7 mm to 0.9 mm	—	DIN 6797	100	000000000	0000
M10	10.5 mm			18.0 mm	0.8 mm to 1.0 mm	—	DIN 6797	50	000000000	0000
M12	13.0 mm			20.5 mm	0.9 mm to 1.2 mm	—	DIN 6797	50	000000000	0000


M14	15.0 mm			24.0 mm	0.9 mm to 1.2 mm	—	DIN 6797	25	000000000	0000
M16	17.0 mm			26.0 mm	1.0 mm to 1.4 mm	—	DIN 6797	25	000000000	0000
M18	19.0 mm			30.0 mm	1.2 mm to 1.5 mm	—	DIN 6797	10	000000000	0000
M20	21.0 mm			33.0 mm	1.2 mm to 1.5 mm	—	DIN 6797	10	000000000	00000


Highly-Corrosion-Resistant Phosphor Bronze



				No. 2	0.089"	0.200"	0.010" to 0.016"	—	ASME B18.21.1	100	000000000	0000


				No. 3	0.109"	0.232"	0.010" to 0.016"	—	ASME B18.21.1	100	000000000	0000
				No. 4	0.115"	0.270"	0.012" to 0.018"	—	ASME B18.21.1	100	000000000	0000
				No. 5	0.136"	0.280"	0.014" to 0.018"	—	ASME B18.21.1	100	000000000	0000
				No. 6	0.141"	0.295"	0.016" to 0.022"	—	ASME B18.21.1	100	000000000	0000
				No. 8	0.168"	0.340"	0.018" to 0.023"	—	ASME B18.21.1	100	000000000	0000
				No. 10	0.195"	0.381"	0.018" to 0.024"	—	ASME B18.21.1	100	000000000	0000
				No. 12	0.231"	0.410"	0.020" to 0.027"	—	ASME B18.21.1	100	000000000	0000
				1/4"	0.256"	0.478"	0.023" to 0.028"	—	ASME B18.21.1	100	000000000	00000
				5/16"	0.320"	0.610"	0.028" to 0.034"	—	ASME B18.21.1	50	000000000	0000
				3/8"	0.384"	0.692"	0.032" to 0.040"	—	ASME B18.21.1	50	000000000	00000


				7/16"	0.448"	0.789"	0.032" to 0.040"	—	ASME B18.21.1	25	000000000	0000
				1/2"	0.512"	0.900"	0.037" to 0.045"	—	ASME B18.21.1	25	000000000	00000
				5/8"	0.640"	1.071"	0.042" to 0.050"	—	ASME B18.21.1	5	000000000	0000
				3/4"	0.795"	1.245"	0.047" to 0.055"	—	ASME B18.21.1	5	000000000	0000

Internal and External Tooth

The strongest hold of all our tooth lock washers, these combine internal and external teeth to boost gripping power. However, the teeth may mar your material and snag on objects. Pair these washers with fasteners that are large enough to make contact with the external teeth, such as pan, button, and binding head screws.

Wear-Resistant 410 Stainless Steel—These grip hard material better than other types of stainless steel. They are not as corrosion resistant as 18-8 and 316 stainless steel, so they are best for environments that experience occasional moisture.

Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.

	ID	OD	Thk.	Specs. Met	Pkg. Qty.		Pkg.
Wear-Resistant 410 Stainless Steel



	No. 4	0.115"	0.475"	0.016" to 0.021"	ASME B18.21.1	100	000000000	00000


	No. 6	0.141"	0.510"	0.023" to 0.028"	ASME B18.21.1	100	000000000	0000
	No. 8	0.168"	0.610"	0.028" to 0.034"	ASME B18.21.1	100	000000000	0000
	No. 10	0.195"	0.610"	0.028" to 0.034"	ASME B18.21.1	100	000000000	0000
	1/4"	0.256"	0.760"	0.032" to 0.040"	ASME B18.21.1	50	000000000	0000
	5/16"	0.320"	0.900"	0.032" to 0.040"	ASME B18.21.1	50	000000000	0000
	3/8"	0.384"	0.985"	0.037" to 0.045"	ASME B18.21.1	25	000000000	0000
	1/2"	0.512"	1.260"	0.047" to 0.055"	ASME B18.21.1	10	000000000	0000


	Zinc-Plated Steel



			No. 4	0.116"	0.478"	0.016" to 0.018"	ASME B18.21.1	50	000000000	0000


			No. 6	0.142"	0.506"	0.023" to 0.027"	ASME B18.21.1	50	000000000	0000
			No. 8	0.168"	0.506"	0.023" to 0.027"	ASME B18.21.1	100	000000000	00000
			No. 10	0.195"	0.601"	0.027" to 0.031"	ASME B18.21.1	100	000000000	00000
			1/4"	0.256"	0.760"	0.033" to 0.037"	ASME B18.21.1	100	000000000	00000
			5/16"	0.320"	0.898"	0.033" to 0.037"	ASME B18.21.1	50	000000000	00000
			3/8"	0.384"	0.985"	0.037" to 0.041"	ASME B18.21.1	50	000000000	00000
			7/16"	0.448"	1.070"	0.043" to 0.047"	ASME B18.21.1	10	000000000	0000
			1/2"	0.512"	1.260"	0.048" to 0.052"	ASME B18.21.1	25	000000000	0000
			5/8"	0.640"	1.620"	0.060" to 0.064"	ASME B18.21.1	5	000000000	00000
			M3	3.2 mm	12.0 mm	1.4 mm to 1.7 mm	—	50	000000000	00000


			M4	4.3 mm	15.0 mm	1.9 mm to 2.3 mm	—	50	000000000	00000
			M4	4.3 mm	18.0 mm	2.2 mm to 2.6 mm	—	25	000000000	0000
			M5	5.3 mm	18.0 mm	2.2 mm to 2.6 mm	—	25	000000000	00000
			M6	6.5 mm	18.0 mm	2.2 mm to 2.6 mm	—	25	000000000	00000
			M8	8.5 mm	22.0 mm	2.7 mm to 3.3 mm	—	25	000000000	00000
			M10	10.5 mm	26.0 mm	2.7 mm to 3.3 mm	—	10	000000000	00000
			M12	12.5 mm	30.0 mm	3.2 mm to 4.0 mm	—	10	000000000	00000
			M16	16.5 mm	35.0 mm	3.8 mm to 4.6 mm	—	5	000000000	00000


			Black-Oxide Steel



					No. 6	0.142"	0.506"	0.023" to 0.027"	ASME B18.21.1	100	000000000	0000


					No. 8	0.168"	0.506"	0.023" to 0.027"	ASME B18.21.1	100	000000000	00000
					1/4"	0.256"	0.760"	0.033" to 0.037"	ASME B18.21.1	100	000000000	00000
					5/16"	0.320"	0.898"	0.033" to 0.037"	ASME B18.21.1	50	000000000	00000
					3/8"	0.384"	0.985"	0.037" to 0.041"	ASME B18.21.1	25	000000000	00000
					7/16"	0.448"	1.070"	0.043" to 0.047"	ASME B18.21.1	25	000000000	00000
					1/2"	0.512"	1.260"	0.048" to 0.052"	ASME B18.21.1	10	000000000	0000

Mil. Spec. Tooth Lock Washers

These washers are manufactured and tested to strict U.S. military standards for material and construction. They resist vibration better than split lock washers to prevent nuts and screws from loosening in applications with constant movement, such as conveyors. Tooth lock washers typically can't be reused because the teeth often get bent when tightened.

Internal Tooth

Corrosion-Resistant Cadmium-Plated Steel—The finish creates a better barrier against rust than zinc plating for use in wet and outdoor environments.

	ID	OD	Thk.	Mil. Spec.	Specs. Met	Pkg. Qty.		Pkg.
Wear-Resistant 410 Stainless Steel



	No. 2	0.089"	0.200"	0.010" to 0.015"	MS35333-69	ASME B18.21.1, NASM35333	25	000000000	00000


	No. 4	0.115"	0.270"	0.015" to 0.019"	MS35333-70	ASME B18.21.1, NASM35333	25	000000000	00000
	No. 6	0.141"	0.295"	0.017" to 0.021"	MS35333-71	ASME B18.21.1, NASM35333	25	000000000	00000
	No. 8	0.168"	0.340"	0.018" to 0.023"	MS35333-72	ASME B18.21.1, NASM35333	25	000000000	00000
	No. 10	0.195"	0.381"	0.020" to 0.025"	MS35333-73	ASME B18.21.1, NASM35333	25	000000000	00000
	1/4"	0.256"	0.478"	0.023" to 0.028"	MS35333-74	ASME B18.21.1, NASM35333	25	000000000	00000
	5/16"	0.332"	0.610"	0.028" to 0.034"	MS35333-75	ASME B18.21.1, NASM35333	25	000000000	0000
	3/8"	0.384"	0.692"	0.032" to 0.040"	MS35333-76	ASME B18.21.1, NASM35333	25	000000000	00000
	7/16"	0.448"	0.789"	0.032" to 0.040"	MS35333-77	ASME B18.21.1, NASM35333	25	000000000	00000
	1/2"	0.512"	0.900"	0.037" to 0.045"	MS35333-78	ASME B18.21.1, NASM35333	10	000000000	00000
	5/8"	0.640"	1.071"	0.042" to 0.050"	MS35333-80	ASME B18.21.1, NASM35333	10	000000000	00000


	3/4"	0.769"	1.245"	0.047" to 0.055"	MS35333-81	ASME B18.21.1, NASM35333	5	000000000	00000
	7/8"	0.894"	1.410"	0.052" to 0.060"	MS35333-82	ASME B18.21.1, NASM35333	5	000000000	00000


	Corrosion-Resistant Cadmium-Plated Steel



			No. 2	0.089"	0.200"	0.010" to 0.015"	MS35333-35	ASME B18.21.1, NASM35333	25	000000000	0000


			No. 4	0.115"	0.270"	0.015" to 0.019"	MS35333-36	ASME B18.21.1, NASM35333	25	000000000	0000
			No. 6	0.141"	0.295"	0.017" to 0.021"	MS35333-37	ASME B18.21.1, NASM35333	25	000000000	0000
			No. 8	0.168"	0.340"	0.018" to 0.023"	MS35333-38	ASME B18.21.1, NASM35333	25	000000000	0000
			No. 10	0.195"	0.381"	0.020" to 0.025"	MS35333-39	ASME B18.21.1, NASM35333	25	000000000	0000
			1/4"	0.256"	0.478"	0.023" to 0.028"	MS35333-40	ASME B18.21.1, NASM35333	25	000000000	0000
			5/16"	0.332"	0.610"	0.028" to 0.034"	MS35333-41	ASME B18.21.1, NASM35333	25	000000000	0000
			3/8"	0.384"	0.692"	0.032" to 0.040"	MS35333-42	ASME B18.21.1, NASM35333	25	000000000	00000
			7/16"	0.448"	0.789"	0.032" to 0.040"	MS35333-43	ASME B18.21.1, NASM35333	25	000000000	00000
			1/2"	0.512"	0.900"	0.037" to 0.045"	MS35333-44	ASME B18.21.1, NASM35333	25	000000000	00000
			5/8"	0.640"	1.071"	0.042" to 0.050"	MS35333-46	ASME B18.21.1, NASM35333	10	000000000	0000


			3/4"	0.769"	1.245"	0.047" to 0.055"	MS35333-47	ASME B18.21.1, NASM35333	10	000000000	0000
			7/8"	0.894"	1.410"	0.052" to 0.060"	MS35333-48	ASME B18.21.1, NASM35333	10	000000000	00000
			1"	1.019"	1.637"	0.059" to 0.067"	MS35333-49	ASME B18.21.1, NASM35333	5	000000000	0000
			1 1/4"	1.260"	1.950"	0.059" to 0.067"	MS35333-51	ASME B18.21.1, NASM35333	5	000000000	0000


			Highly-Corrosion-Resistant Phosphor Bronze



					No. 2	0.089"	0.200"	0.010" to 0.015"	MS35333-103	ASME B18.21.1, NASM35333	25	000000000	0000


					No. 4	0.115"	0.270"	0.015" to 0.019"	MS35333-104	ASME B18.21.1, NASM35333	25	000000000	0000
					No. 6	0.141"	0.295"	0.017" to 0.021"	MS35333-105	ASME B18.21.1, NASM35333	25	000000000	00000
					No. 8	0.168"	0.340"	0.018" to 0.023"	MS35333-106	ASME B18.21.1, NASM35333	25	000000000	00000
					No. 10	0.195"	0.381"	0.020" to 0.025"	MS35333-107	ASME B18.21.1, NASM35333	25	000000000	00000
					1/4"	0.256"	0.478"	0.023" to 0.028"	MS35333-108	ASME B18.21.1, NASM35333	25	000000000	00000
					5/16"	0.332"	0.610"	0.028" to 0.034"	MS35333-109	ASME B18.21.1, NASM35333	10	000000000	0000
					3/8"	0.384"	0.692"	0.032" to 0.040"	MS35333-110	ASME B18.21.1, NASM35333	10	000000000	0000
					1/2"	0.512"	0.900"	0.037" to 0.045"	MS35333-113	ASME B18.21.1, NASM35333	5	000000000	0000

Domed Tooth Lock Washers

Limit damage to your material while ensuring nuts and screws stay tight. These washers have a slight dome that flattens under pressure, distributing pressure over a wide surface area and eliminating stress points. They also have smooth tabs on the outside edge that add friction for a tight grip, without digging into your mounting surface the way a sharp tooth would. Tooth lock washers prevent fasteners from loosening in applications with constant movement, such as conveyors. They typically can't be reused because the teeth often get bent when tightened.

Internal Tooth

Internal teeth dig into the nut or screw to prevent it from backing out. They grip best on fasteners with small diameters, such as fillister and cheese head screws.

Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.

	ID	OD	Thk.	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	No. 6	0.146"	0.569"	0.023" to 0.027"	10	000000000	00000


	No. 8	0.168"	0.569"	0.023" to 0.027"	10	000000000	00000
	No. 10	0.195"	0.569"	0.027" to 0.031"	10	000000000	00000
	1/4"	0.256"	0.698"	0.048" to 0.052"	5	000000000	00000
	5/16"	0.320"	0.885"	0.060" to 0.064"	5	000000000	00000
	3/8"	0.384"	1.010"	0.060" to 0.064"	5	000000000	00000

Tooth Lock Washer Assortments

Image of Product. Front orientation. Lock Washers. Sold as Assortments, Tooth Washer.

Keep a collection of tooth lock washers on hand to work with a range of screw sizes. The teeth bite into material to prevent fasteners from loosening in applications with constant movement, such as conveyors. External-tooth lock washers grip tighter than internal-tooth lock washers, however, they may mar your material and snag on objects. Tooth lock washers typically can't be reused because the teeth often get bent when tightened.

Labels in the lid include our part numbers, so it's easy to replenish the assortments.

Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.

	Sizes Included	Container Type		Each
Zinc-Plated Steel



	1,335	635 External Tooth Lock Washers (For No. 4 to 1/2" Screw Sizes) 700 Internal Tooth Lock Washers (For No. 2 to 3/8" Screw Sizes)	Plastic Box	000000000	000000