Stainless Steel Tooth Lock Washers

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Washer Type

Material

400 Series Stainless Steel

410 Stainless Steel

System of Measurement

Screw Size

Tooth Location

Internal and External

Thickness

Performance

Specifications Met

Finish

REACH

RoHS

DFARS Specialty Metals

Hardness

Rockwell C40 to Rockwell C50

Not Rated

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Export Control Classification Number (ECCN)

EAR99

Military Specification

Countersink Angle

188 Products

Washer Type

Countersunk

Grip flat- and oval-head screws for a secure hold without overtightening

6 products

Performance

Wear Resistant

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

84 products

Certification

Mil. Spec.

Adhere to U.S. military standards for material and construction

27 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.

External Tooth

Teeth on the outside edge bite into both the fastener and the mating surface for a stronger hold than internal-tooth lock washers. However, they may mar your material and snag on objects. Pair these washers with nuts and screws that are large enough to make contact with the teeth, such as pan, button, and binding 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.

Black-Oxide 18-8 Stainless Steel—Typically chosen for their appearance, these washers have a dark, matte coating to create a finished look. They won't rust in wet and outdoor environments, but can't hold up to harsh chemicals as well as 316 stainless steel.

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.

DIN 6798—Best for slightly bumpy or irregular surfaces because the teeth are angled to make even contact with the material.

	For Screw Size	ID	OD	Thk.	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel



		No. 2	0.086"	0.189"	0.010" to 0.013"	ASME B18.21.1	100	95584A311	00000


		No. 4	0.115"	0.260"	0.012" to 0.018"	ASME B18.21.1	100	95584A200	0000
		No. 6	0.141"	0.320"	0.016" to 0.022"	ASME B18.21.1	100	95584A201	0000
		No. 8	0.168"	0.381"	0.018" to 0.023"	ASME B18.21.1	100	95584A203	0000
		No. 10	0.195"	0.410"	0.018" to 0.024"	ASME B18.21.1	100	95584A205	0000
		No. 12	0.221"	0.475"	0.020" to 0.027"	ASME B18.21.1	100	95584A511	0000
		1/4"	0.256"	0.510"	0.023" to 0.028"	ASME B18.21.1	100	95584A207	0000
		5/16"	0.320"	0.610"	0.028" to 0.034"	ASME B18.21.1	50	95584A209	0000
		3/8"	0.384"	0.694"	0.032" to 0.040"	ASME B18.21.1	25	95584A211	0000
		1/2"	0.513"	0.900"	0.037" to 0.045"	ASME B18.21.1	50	95584A512	0000
		5/8"	0.641"	1.070"	0.042" to 0.050"	ASME B18.21.1	10	95584A312	0000


		3/4"	0.768"	1.260"	0.047" to 0.055"	ASME B18.21.1	5	95584A313	0000
		M2	2.2 mm	4.5 mm	0.2 mm to 0.4 mm	DIN 6797	100	95060A510	0000
		M2	2.2 mm	4.5 mm	0.2 mm to 0.4 mm	DIN 6798	100	91120A311	0000
		M2.5	2.7 mm	5.5 mm	0.3 mm to 0.5 mm	DIN 6797	100	95060A520	0000
		M2.5	2.7 mm	5.5 mm	0.3 mm to 0.5 mm	DIN 6798	100	91120A312	0000
		M3	3.2 mm	6.0 mm	0.3 mm to 0.5 mm	DIN 6797	100	95060A320	0000
		M3	3.2 mm	6.0 mm	0.3 mm to 0.5 mm	DIN 6798	100	91120A120	0000
		M3.5	3.7 mm	7.0 mm	0.4 mm to 0.6 mm	DIN 6797	100	95060A530	0000
		M4	4.3 mm	8.0 mm	0.4 mm to 0.6 mm	DIN 6797	100	95060A330	0000
		M4	4.3 mm	8.0 mm	0.4 mm to 0.6 mm	DIN 6798	100	91120A130	0000


		M5	5.3 mm	10.0 mm	0.5 mm to 0.7 mm	DIN 6797	100	95060A350	0000
		M5	5.3 mm	10.0 mm	0.5 mm to 0.7 mm	DIN 6798	100	91120A140	0000
		M6	6.4 mm	11.0 mm	0.6 mm to 0.8 mm	DIN 6797	100	95060A360	0000
		M6	6.4 mm	11.0 mm	0.6 mm to 0.8 mm	DIN 6798	100	91120A160	0000
		M7	7.4 mm	12.5 mm	0.7 mm to 0.9 mm	DIN 6797	100	95060A460	0000
		M8	8.4 mm	15.0 mm	0.7 mm to 0.9 mm	DIN 6797	100	95060A390	0000
		M8	8.4 mm	15.0 mm	0.7 mm to 0.9 mm	DIN 6798	100	91120A180	0000
		M10	10.5 mm	18.0 mm	0.8 mm to 1.0 mm	DIN 6797	100	95060A400	0000
		M10	10.5 mm	18.0 mm	0.8 mm to 1.0 mm	DIN 6798	100	91120A200	00000
		M12	13.0 mm	20.5 mm	0.9 mm to 1.2 mm	DIN 6797	50	95060A411	0000


		M12	13.0 mm	20.5 mm	0.9 mm to 1.2 mm	DIN 6798	50	91120A211	0000
		M14	15.0 mm	24.0 mm	0.9 mm to 1.2 mm	DIN 6797	50	95060A420	0000
		M16	17.0 mm	26.0 mm	1.0 mm to 1.4 mm	DIN 6797	50	95060A540	00000
		M16	17.0 mm	26.0 mm	1.0 mm to 1.4 mm	DIN 6798	50	91120A235	0000
		M18	19.0 mm	30.0 mm	1.2 mm to 1.6 mm	DIN 6797	10	95060A440	0000
		M20	21.0 mm	33.0 mm	1.2 mm to 1.5 mm	DIN 6798	10	91120A241	0000
		M20	21.0 mm	33.0 mm	1.2 mm to 1.6 mm	DIN 6797	10	95060A450	0000
		M22	23.0 mm	36.0 mm	1.3 mm to 1.7 mm	DIN 6797	10	95060A470	0000
		M24	25.0 mm	38.0 mm	1.3 mm to 1.7 mm	DIN 6797	10	95060A480	0000
		M24	25.0 mm	38.0 mm	1.4 mm to 1.6 mm	DIN 6798	10	91120A245	0000


		M30	31.0 mm	48.0 mm	1.4 mm to 1.8 mm	DIN 6797	10	95060A500	00000


		Black-Oxide 18-8 Stainless Steel



				No. 6	0.141"	0.320"	0.016" to 0.022"	ASME B18.21.1	100	95584A314	0000


No. 8				0.168"	0.381"	0.018" to 0.023"	ASME B18.21.1	100	95584A315	0000
No. 10	0.195"			0.410"	0.018" to 0.024"	ASME B18.21.1	100	95584A316	0000
1/4"	0.256"			0.510"	0.023" to 0.028"	ASME B18.21.1	100	95584A317	0000
5/16"	0.320"			0.610"	0.028" to 0.034"	ASME B18.21.1	100	95584A318	0000
3/8"	0.384"			0.694"	0.032" to 0.040"	ASME B18.21.1	100	95584A319	00000


Highly Corrosion-Resistant 316 Stainless Steel



				No. 4	0.115"	0.260"	0.012" to 0.018"	ASME B18.21.1	10	90375A005	0000


				No. 6	0.141"	0.320"	0.016" to 0.022"	ASME B18.21.1	10	90375A007	0000
				No. 8	0.168"	0.381"	0.018" to 0.023"	ASME B18.21.1	10	90375A009	0000
				No. 10	0.195"	0.410"	0.018" to 0.024"	ASME B18.21.1	10	90375A011	0000
				1/4"	0.256"	0.510"	0.023" to 0.028"	ASME B18.21.1	25	90375A110	0000
				5/16"	0.320"	0.610"	0.028" to 0.034"	ASME B18.21.1	25	90375A120	0000
				3/8"	0.384"	0.694"	0.032" to 0.040"	ASME B18.21.1	10	90375A130	0000
				1/2"	0.513"	0.900"	0.037" to 0.045"	ASME B18.21.1	10	90375A140	0000
				M3	3.2 mm	6.0 mm	0.3 mm to 0.5 mm	DIN 6797	5	90412A110	0000
				M4	4.3 mm	8.0 mm	0.4 mm to 0.6 mm	DIN 6797	5	90412A120	0000
				M5	5.3 mm	10.0 mm	0.5 mm to 0.7 mm	DIN 6797	5	90412A130	0000


				M6	6.4 mm	11.0 mm	0.6 mm to 0.8 mm	DIN 6797	5	90412A140	0000
				M8	8.4 mm	15.0 mm	0.7 mm to 0.9 mm	DIN 6797	5	90412A150	0000
				M10	10.5 mm	18.0 mm	0.8 mm to 1.0 mm	DIN 6797	1	90412A160	0000
				M12	13.0 mm	20.5 mm	0.9 mm to 1.2 mm	DIN 6797	1	90412A170	0000
				M14	15.0 mm	24.0 mm	0.9 mm to 1.2 mm	DIN 6797	1	90412A180	0000
				M16	17.3 mm	26.0 mm	1.0 mm to 1.4 mm	DIN 6797	1	90412A190	0000
				M20	21.0 mm	33.0 mm	1.2 mm to 1.6 mm	DIN 6797	1	90412A200	0000


				Wear-Resistant 400 Series Stainless Steel



						No. 2	0.096"	0.195"	0.010" to 0.016"	—	100	98438A200	0000


						No. 3	0.102"	0.235"	0.010" to 0.016"	ASME B18.21.1	100	98438A205	0000
						No. 4	0.115"	0.260"	0.012" to 0.018"	ASME B18.21.1	100	98438A210	0000
						No. 5	0.129"	0.285"	0.014" to 0.020"	ASME B18.21.1	100	98438A215	0000
						No. 6	0.141"	0.320"	0.016" to 0.022"	ASME B18.21.1	100	98438A220	0000
						No. 8	0.168"	0.381"	0.018" to 0.023"	ASME B18.21.1	100	98438A225	0000
						No. 10	0.195"	0.410"	0.018" to 0.024"	ASME B18.21.1	100	98438A230	0000
						No. 12	0.221"	0.475"	0.020" to 0.027"	ASME B18.21.1	100	98438A235	0000
						1/4"	0.256"	0.510"	0.023" to 0.028"	ASME B18.21.1	100	98438A240	0000
						5/16"	0.320"	0.610"	0.028" to 0.034"	ASME B18.21.1	100	98438A030	0000
						3/8"	0.384"	0.694"	0.032" to 0.040"	ASME B18.21.1	50	98438A031	0000


						7/16"	0.448"	0.760"	0.032" to 0.040"	ASME B18.21.1	50	98438A032	0000
						1/2"	0.513"	0.900"	0.037" to 0.045"	ASME B18.21.1	25	98438A033	0000
						9/16"	0.576"	0.985"	0.037" to 0.045"	ASME B18.21.1	25	93419A111	0000
						5/8"	0.641"	1.070"	0.042" to 0.050"	ASME B18.21.1	25	98438A035	00000
						3/4"	0.768"	1.260"	0.047" to 0.055"	ASME B18.21.1	25	98438A036	00000
		7/8"				0.897"	1.410"	0.052" to 0.060"	ASME B18.21.1	5	93419A112	0000
		1"	1.025"			1.620"	0.059" to 0.067"	ASME B18.21.1	5	93419A113	00000

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.

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.

	For Screw Size	ID	OD	Thk.	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	91757A101	00000


		No. 6	0.141"	0.295"	0.016" to 0.022"	ASME B18.21.1	100	91757A103	0000
		No. 8	0.168"	0.340"	0.018" to 0.023"	ASME B18.21.1	100	91757A105	0000
		No. 10	0.195"	0.381"	0.018" to 0.024"	ASME B18.21.1	100	91757A107	0000
		No. 12	0.231"	0.410"	0.020" to 0.027"	ASME B18.21.1	100	91757A132	0000
		1/4"	0.256"	0.478"	0.023" to 0.028"	ASME B18.21.1	100	91757A109	0000
		5/16"	0.320"	0.610"	0.028" to 0.034"	ASME B18.21.1	50	91757A111	0000
		3/8"	0.384"	0.692"	0.032" to 0.040"	ASME B18.21.1	25	91757A113	0000
		1/2"	0.512"	0.900"	0.037" to 0.045"	ASME B18.21.1	10	91757A117	0000
		9/16"	0.576"	0.985"	0.037" to 0.045"	ASME B18.21.1	10	91757A122	0000
		5/8"	0.640"	1.071"	0.042" to 0.050"	ASME B18.21.1	10	91757A128	0000


		3/4"	0.769"	1.245"	0.047" to 0.055"	ASME B18.21.1	5	91757A131	0000
		M2	2.2 mm	4.5 mm	0.2 mm to 0.4 mm	DIN 6797	100	93925A210	0000
		M2.3	2.5 mm	5.0 mm	0.2 mm to 0.4 mm	DIN 6797	100	93925A411	0000
		M2.5	2.7 mm	5.5 mm	0.2 mm to 0.5 mm	DIN 6797	100	93925A220	0000
		M3	3.2 mm	6.0 mm	0.3 mm to 0.5 mm	DIN 6797	100	93925A240	0000
		M3.5	3.7 mm	7.0 mm	0.4 mm to 0.6 mm	DIN 6797	100	93925A221	0000
		M4	4.3 mm	8.0 mm	0.4 mm to 0.6 mm	DIN 6797	100	93925A250	0000
		M5	5.3 mm	10.0 mm	0.5 mm to 0.7 mm	DIN 6797	100	93925A260	0000
		M6	6.4 mm	11.0 mm	0.6 mm to 0.8 mm	DIN 6797	100	93925A270	0000
		M7	7.4 mm	12.5 mm	0.7 mm to 0.9 mm	DIN 6797	50	93925A412	00000


		M8	8.4 mm	15.0 mm	0.7 mm to 0.9 mm	DIN 6797	100	93925A280	0000
		M10	10.5 mm	18.0 mm	0.8 mm to 1.0 mm	DIN 6797	50	93925A290	0000
		M12	13.0 mm	20.5 mm	0.9 mm to 1.2 mm	DIN 6797	50	93925A300	0000
		M14	15.0 mm	24.0 mm	0.9 mm to 1.2 mm	DIN 6797	25	93925A310	0000
		M16	17.0 mm	26.0 mm	1.0 mm to 1.4 mm	DIN 6797	25	93925A320	0000
		M18	19.0 mm	30.0 mm	1.2 mm to 1.5 mm	DIN 6797	10	93925A330	0000
		M20	21.0 mm	33.0 mm	1.2 mm to 1.5 mm	DIN 6797	10	93925A340	0000
		M22	23.0 mm	36.0 mm	1.3 mm to 1.6 mm	DIN 6797	10	93925A413	00000
		M24	25.0 mm	38.0 mm	1.3 mm to 1.6 mm	DIN 6797	10	93925A414	00000


		Highly Corrosion-Resistant 316 Stainless Steel



				No. 4	0.115"	0.270"	0.012" to 0.018"	ASME B18.21.1	5	91108A110	0000


				No. 6	0.141"	0.295"	0.016" to 0.022"	ASME B18.21.1	5	91108A140	0000
				No. 8	0.168"	0.340"	0.018" to 0.023"	ASME B18.21.1	5	91108A220	0000
				No. 10	0.195"	0.381"	0.018" to 0.024"	ASME B18.21.1	5	91108A250	0000
				1/4"	0.256"	0.478"	0.023" to 0.028"	ASME B18.21.1	5	91108A330	0000
				5/16"	0.320"	0.610"	0.028" to 0.034"	ASME B18.21.1	5	91108A360	0000
				3/8"	0.384"	0.692"	0.032" to 0.040"	ASME B18.21.1	5	91108A440	0000
				1/2"	0.530"	0.867"	0.037" to 0.045"	ASME B18.21.1	5	91108A111	0000


				Wear-Resistant 400 Series Stainless Steel



						No. 2	0.089"	0.200"	0.010" to 0.016"	ASME B18.21.1	100	98449A500	0000


No. 2						0.095"	0.200"	0.010" to 0.016"	ASME B18.21.1	1,000	98449A003	00000
No. 3	0.102"					0.232"	0.010" to 0.016"	ASME B18.21.1	100	98449A505	0000
No. 4	0.115"					0.270"	0.012" to 0.018"	ASME B18.21.1	100	98449A510	0000
No. 4	0.123"					0.270"	0.012" to 0.018"	ASME B18.21.1	1,000	98449A005	00000
No. 5	0.136"					0.280"	0.014" to 0.020"	ASME B18.21.1	100	98449A515	0000
No. 5	0.136"					0.280"	0.014" to 0.020"	ASME B18.21.1	1,000	98449A006	00000
No. 6	0.141"					0.295"	0.016" to 0.022"	ASME B18.21.1	100	98449A520	0000
No. 6	0.150"					0.295"	0.016" to 0.022"	ASME B18.21.1	1,000	98449A007	00000
No. 8	0.168"					0.340"	0.018" to 0.023"	ASME B18.21.1	100	98449A525	0000
No. 9	0.176"					0.340"	0.018" to 0.023"	ASME B18.21.1	1,000	98449A009	00000


No. 10	0.195"					0.381"	0.018" to 0.024"	ASME B18.21.1	100	98449A530	0000
No. 10	0.204"					0.381"	0.018" to 0.024"	ASME B18.21.1	1,000	98449A011	00000
No. 12	0.221"					0.410"	0.020" to 0.027"	ASME B18.21.1	100	98449A535	0000
1/4"	0.256"					0.478"	0.023" to 0.028"	ASME B18.21.1	100	98449A540	0000
1/4"	0.267"					0.478"	0.023" to 0.028"	ASME B18.21.1	1,000	98449A029	00000
5/16"	0.320"					0.610"	0.028" to 0.034"	ASME B18.21.1	100	98449A030	0000
3/8"	0.384"					0.692"	0.032" to 0.040"	ASME B18.21.1	100	98449A031	00000
7/16"	0.448"					0.789"	0.032" to 0.040"	ASME B18.21.1	100	98449A032	00000
1/2"	0.512"					0.900"	0.037" to 0.045"	ASME B18.21.1	50	98449A033	00000
9/16"	0.576"					0.985"	0.037" to 0.045"	ASME B18.21.1	50	98449A034	00000


5/8"	0.640"					1.071"	0.042" to 0.050"	ASME B18.21.1	25	98449A035	00000
3/4"	0.769"					1.245"	0.047" to 0.055"	ASME B18.21.1	25	98449A036	00000
7/8"	0.927"					1.410"	0.052" to 0.060"	ASME B18.21.1	5	98449A113	0000
1"	1.060"					1.640"	0.059" to 0.067"	ASME B18.21.1	5	98449A114	00000

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.

	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	90588A111	00000


	No. 6	0.141"	0.510"	0.023" to 0.028"	ASME B18.21.1	100	90588A112	0000
	No. 8	0.168"	0.610"	0.028" to 0.034"	ASME B18.21.1	100	90588A113	0000
	No. 10	0.195"	0.610"	0.028" to 0.034"	ASME B18.21.1	100	90588A114	0000
	1/4"	0.256"	0.760"	0.032" to 0.040"	ASME B18.21.1	50	90588A115	0000
	5/16"	0.320"	0.900"	0.032" to 0.040"	ASME B18.21.1	50	90588A116	0000
	3/8"	0.384"	0.985"	0.037" to 0.045"	ASME B18.21.1	25	90588A117	0000
	1/2"	0.512"	1.260"	0.047" to 0.055"	ASME B18.21.1	10	90588A118	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.

External Tooth

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



	No. 4	0.115"	0.260"	0.015" to 0.019"	MS35335-57	ASME B18.21.1	25	97775A110	000000


	No. 6	0.141"	0.320"	0.016" to 0.022"	MS35335-58	ASME B18.21.1	25	97775A150	00000
	No. 8	0.168"	0.381"	0.018" to 0.023"	MS35335-59	ASME B18.21.1	25	97775A220	00000
	No. 10	0.195"	0.410"	0.020" to 0.025"	MS35335-60	ASME B18.21.1	25	97775A260	00000
	1/4"	0.256"	0.510"	0.023" to 0.028"	MS35335-61	ASME B18.21.1	25	97775A330	00000
	5/16"	0.320"	0.610"	0.028" to 0.034"	MS35335-62	ASME B18.21.1	25	97775A370	00000
	3/8"	0.384"	0.694"	0.032" to 0.040"	MS35335-63	ASME B18.21.1	25	97775A440	00000
	7/16"	0.448"	0.760"	0.032" to 0.040"	MS35335-64	ASME B18.21.1	25	97775A511	00000
	1/2"	0.513"	0.900"	0.037" to 0.045"	MS35335-65	ASME B18.21.1	10	97775A512	0000
	9/16"	0.576"	0.985"	0.037" to 0.045"	MS35335-66	ASME B18.21.1	10	97775A513	0000
	5/8"	0.641"	1.070"	0.042" to 0.050"	MS35335-67	ASME B18.21.1	5	97775A514	0000


	3/4"	0.768"	1.260"	0.047" to 0.055"	MS35335-68	ASME B18.21.1	5	97775A515	0000
	7/8"	0.897"	1.410"	0.052" to 0.060"	MS35335-69	ASME B18.21.1	1	97775A516	0000
	1"	1.025"	1.620"	0.059" to 0.067"	MS35335-70	ASME B18.21.1	1	97775A517	0000

Internal Tooth

	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, NASM35333	ASME B18.21.1	25	96551A110	00000


	No. 4	0.115"	0.270"	0.015" to 0.019"	MS35333-70, NASM35333	ASME B18.21.1	25	96551A550	00000
	No. 6	0.141"	0.295"	0.017" to 0.021"	MS35333-71, NASM35333	ASME B18.21.1	25	96551A610	00000
	No. 8	0.168"	0.340"	0.018" to 0.023"	MS35333-72, NASM35333	ASME B18.21.1	25	96551A670	00000
	No. 10	0.195"	0.381"	0.020" to 0.025"	MS35333-73, NASM35333	ASME B18.21.1	25	96551A770	00000
	1/4"	0.256"	0.478"	0.023" to 0.028"	MS35333-74, NASM35333	ASME B18.21.1	25	96551A790	00000
	5/16"	0.332"	0.610"	0.028" to 0.034"	MS35333-75, NASM35333	ASME B18.21.1	25	96551A120	0000
	3/8"	0.384"	0.692"	0.032" to 0.040"	MS35333-76, NASM35333	ASME B18.21.1	25	96551A130	00000
	7/16"	0.448"	0.789"	0.032" to 0.040"	MS35333-77, NASM35333	ASME B18.21.1	25	96551A140	00000
	1/2"	0.512"	0.900"	0.037" to 0.045"	MS35333-78, NASM35333	ASME B18.21.1	10	96551A150	00000
	5/8"	0.640"	1.071"	0.042" to 0.050"	MS35333-80, NASM35333	ASME B18.21.1	10	96551A160	00000


	3/4"	0.769"	1.245"	0.047" to 0.055"	MS35333-81, NASM35333	ASME B18.21.1	5	96551A170	00000
	7/8"	0.894"	1.410"	0.052" to 0.060"	MS35333-82, NASM35333	ASME B18.21.1	5	96551A180	00000

Countersunk Tooth Lock Washers

These washers grip flat- and oval-head countersunk screws, so you get a secure hold without overtightening. They resist loosening in applications with constant motion, such as conveyors. Tooth lock washers typically can't be reused because the teeth often get bent when tightened.

External Tooth

Teeth on the outside edge bite into both the screw head and the mating surface to lock the assembly in place.

	ID	OD	Thk.	Countersink Angle	Specs. Met	Pkg. Qty.		Pkg.
Wear-Resistant 400 Series Stainless Steel



	No. 6	0.140"	0.289"	0.017" to 0.021"	82°	ASME B18.21.1	100	90900A007	00000


	No. 8	0.167"	0.322"	0.017" to 0.021"	82°	ASME B18.21.1	100	90900A009	0000
	No. 10	0.195"	0.354"	0.020" to 0.025"	82°	ASME B18.21.1	25	90900A012	0000
	No. 12	0.220"	0.421"	0.020" to 0.025"	82°	ASME B18.21.1	50	90900A111	0000
	1/4"	0.255"	0.454"	0.020" to 0.025"	82°	ASME B18.21.1	25	90900A030	0000
	5/16"	0.318"	0.599"	0.023" to 0.028"	82°	ASME B18.21.1	25	90900A112	0000