Stainless Steel Square Washers

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120 Products

Square Washers

With flat sides, these washers fit into slots and channels and won't rotate out of position. They are also wider and thicker than most round washers, so they distribute heavier loads across a larger surface area. Square washers are commonly used to anchor heavy machinery, fasten framing to floors, and hang pipe and conduit from strut channel.

Stainless Steel About Stainless Steel

18-8 Stainless Steel—The choice for wet and outdoor environments, these washers resist rust. However, they won'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.

Material Certificate—Washers include a report with a traceable lot number.

	For Screw Size	ID	Wd.	Thk.	Certificate Type		Each
18-8 Stainless Steel



		No. 10	0.219"	2.000"	0.056" to 0.063"	—	91122A151	00000


		1/4"	0.313"	2.000"	0.235" to 0.265"	Material Certificate	91122A110	0000
		5/16"	0.343"	2.000"	0.056" to 0.063"	—	91122A152	0000
		3/8"	0.438"	2.000"	0.235" to 0.265"	Material Certificate	91122A115	0000
		7/16"	0.500"	2.000"	0.235" to 0.265"	—	91122A211	0000
		1/2"	0.563"	2.000"	0.112" to 0.128"	Material Certificate	91122A212	00000
		1/2"	0.563"	2.000"	0.235" to 0.265"	Material Certificate	91122A120	0000
		1/2"	0.563"	3.000"	0.235" to 0.265"	Material Certificate	91122A213	00000
		5/8"	0.688"	2.000"	0.112" to 0.128"	—	91122A214	00000
		5/8"	0.688"	2.000"	0.235" to 0.265"	Material Certificate	91122A125	0000
		5/8"	0.688"	3.000"	0.235" to 0.265"	—	91122A215	00000


		3/4"	0.813"	2.000"	0.112" to 0.128"	—	91122A216	00000
		3/4"	0.813"	2.000"	0.235" to 0.265"	Material Certificate	91122A130	0000
		3/4"	0.813"	3.000"	0.235" to 0.265"	Material Certificate	91122A217	00000
		7/8"	0.938"	2.000"	0.235" to 0.265"	—	91122A135	0000
		7/8"	0.938"	3.000"	0.235" to 0.265"	Material Certificate	91122A218	00000
		1"	1.063"	2.000"	0.235" to 0.265"	Material Certificate	91122A140	0000
		1"	1.063"	3.000"	0.235" to 0.265"	Material Certificate	91122A219	00000
		1 1/4"	1.313"	2.000"	0.235" to 0.265"	—	91122A145	0000
		1 1/4"	1.313"	3.000"	0.220" to 0.280"	Material Certificate	91122A221	00000
		M6	9.0 mm	50.0 mm	6.0 mm	—	91122A222	00000


		M8	11.0 mm	50.0 mm	6.0 mm	—	91122A223	00000
		M10	13.0 mm	50.0 mm	6.0 mm	Material Certificate	91122A224	00000
		M12	16.0 mm	50.0 mm	6.0 mm	Material Certificate	91122A225	00000
		M14	18.0 mm	50.0 mm	6.0 mm	Material Certificate	91122A226	00000
		M16	22.0 mm	50.0 mm	6.0 mm	Material Certificate	91122A227	00000
		M20	26.0 mm	50.0 mm	6.0 mm	Material Certificate	91122A228	00000
		M22	28.0 mm	50.0 mm	6.0 mm	Material Certificate	91122A229	00000
		M24	32.0 mm	50.0 mm	6.0 mm	Material Certificate	91122A310	00000
		M30	38.0 mm	50.0 mm	6.0 mm	Material Certificate	91122A311	00000


		Highly Corrosion-Resistant 316 Stainless Steel



				No. 8	0.187"	0.500"	0.048" to 0.075"	—	92244A116	0000


				No. 8	0.187"	0.547"	0.034" to 0.060"	—	92244A115	0000
				No. 8	0.188"	2.000"	0.056" to 0.063"	—	92244A214	0000
				No. 10	0.219"	2.000"	0.056" to 0.063"	—	92244A211	0000
				No. 12	0.265"	0.438"	0.048" to 0.075"	—	92244A117	0000
				1/4"	0.285"	0.500"	0.114" to 0.126"	—	92244A215	0000
				1/4"	0.285"	2.000"	0.056" to 0.063"	—	92244A212	0000
				5/16"	0.375"	2.000"	0.090" to 0.115"	—	92244A113	0000
				3/8"	0.406"	0.750"	0.114" to 0.126"	—	92244A216	0000
				3/8"	0.406"	0.813"	0.114" to 0.126"	—	92244A217	0000
				3/8"	0.438"	2.000"	0.115" to 0.135"	—	92244A111	0000


				1/2"	0.530"	0.813"	0.115" to 0.135"	—	92244A119	0000
				1/2"	0.531"	1.250"	0.100" to 0.111"	—	92244A218	0000
				1/2"	0.562"	2.000"	0.020" to 0.042"	—	92244A112	0000
				1/2"	0.562"	2.000"	0.090" to 0.134"	—	92244A118	0000
5/8"				0.656"	1.250"	0.090" to 0.115"	—	92244A114	0000
3/4"	0.812"			1.250"	0.100" to 0.111"	—	92244A213	0000
3/4"	0.812"			2.000"	0.114" to 0.126"	—	92244A219	0000

Rectangular Washers

Narrower than clipped and square washers, these fit in the thinnest channels and slots. When positioned against a flat edge, they won't rotate out of position, so your assembly stays stable. Rectangular washers have a large surface area to withstand heavy loads and distribute pressure evenly under nuts and screws. They are commonly used to anchor heavy machinery, fasten framing to floors, and hang pipe and conduit from strut channel.

Stainless Steel About Stainless Steel

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

Material Certificate—Washers include a report with a traceable lot number.

	ID	Lg.	Wd.	Thk.	Certificate Type	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	No. 4	0.125"	0.500"	0.250"	0.024" to 0.038"	Material Certificate	50	92516A110	000000


	No. 6	0.143"	0.400"	0.220"	0.028" to 0.034"	—	50	92516A120	00000
	No. 6	0.147"	0.375"	0.330"	0.028" to 0.034"	—	50	92516A130	00000
	No. 6	0.158"	0.438"	0.375"	0.036" to 0.044"	—	50	92516A140	00000
	No. 8	0.180"	0.750"	0.375"	0.046" to 0.054"	Material Certificate	25	92516A150	00000
	No. 10	0.203"	0.875"	0.438"	0.027" to 0.033"	—	25	92516A160	00000
	No. 12	0.234"	1.000"	0.500"	0.036" to 0.045"	—	25	92516A170	00000
	1/4"	0.281"	1.250"	0.625"	0.043" to 0.057"	Material Certificate	10	92516A180	00000
	5/16"	0.344"	1.500"	0.750"	0.043" to 0.057"	Material Certificate	5	92516A190	00000
	3/8"	0.406"	1.500"	0.750"	0.056" to 0.064"	Material Certificate	5	92516A210	00000
	1/2"	0.531"	2.000"	1.000"	0.056" to 0.064"	Material Certificate	5	92516A220	00000


	5/8"	0.687"	2.250"	1.125"	0.071" to 0.085"	—	1	92516A230	0000

Square Strut Channel Washers

Combine these washers with nuts, threaded rods, or bolts to hang strut channel or attach objects to it. They take the pressure off fasteners, protecting mounting surfaces and preventing damage to the channel.

304 Stainless Steel—The choice for wet and outdoor environments, these resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

316 Stainless Steel—Superior to 304 stainless steel, these won't degrade when exposed to harsh weather, salt water, and most chemicals.

		For Channel		Each		Package
	For Rod Dia.	Ht.	Wd.		Each	Pkg. Qty.		Pkg.
304 Stainless Steel



		1/4"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3133T28	00000	100	3133T281	0000000


		5/16"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3133T25	0000	100	3133T251	000000
		3/8"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3133T14	0000	100	3133T141	000000
		1/2"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3133T15	0000	100	3133T151	000000
		5/8"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3133T26	0000	50	3133T261	000000
		3/4"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3133T27	0000	25	3133T271	000000
		7/8"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3133T29	0000	25	3133T291	000000
		8 mm	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3133T36	0000	50	3133T361	000000
		10 mm	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3133T37	0000	50	3133T371	000000
		12 mm	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3133T38	0000	50	3133T381	000000


		316 Stainless Steel



				1/4"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3133T43	0000	100	3133T431	000000


				3/8"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3133T44	0000	50	3133T441	000000
				1/2"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3133T45	0000	50	3133T451	000000

Washers for Square-Neck Bolts

These washers fit snugly around carriage, plow, and elevator bolts to distribute pressure evenly. The square hole also stops the washer from spinning during installation, so it stays aligned with the bolt for a sturdy connection.

Stainless Steel

Without Prongs

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

	Inside Wd.	OD	Thk.	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	No. 10	0.204"	0.437"	0.025" to 0.035"	50	90452A115	000000


	No. 10	0.226"	0.500"	0.043" to 0.053"	50	90452A116	00000
	No. 10	0.253"	0.561"	0.028" to 0.034"	50	90452A117	00000
	1/4"	0.320"	0.680"	0.055" to 0.065"	25	90452A118	00000
	5/16"	0.385"	0.750"	0.043" to 0.053"	25	90452A119	00000
	3/8"	0.392"	0.900"	0.085" to 0.095"	10	90452A121	00000
	3/8"	0.405"	0.700"	0.055" to 0.065"	25	90452A122	00000
	7/16"	0.517"	0.937"	0.055" to 0.065"	25	90452A123	00000
	1/2"	0.555"	1.000"	0.055" to 0.065"	10	90452A124	00000
	1/2"	0.617"	1.125"	0.055" to 0.065"	10	90452A125	00000
	5/8"	0.650"	1.500"	0.115" to 0.125"	5	90452A126	00000


	5/8"	0.700"	1.250"	0.055" to 0.065"	10	90452A127	00000
	3/4"	0.812"	1.375"	0.055" to 0.065"	5	90452A128	0000

Leveling Washers for I-Beams


Mounted on an I-Beam

Commonly called beveled washers, these are tapered to fit inside an I-beam's flange to provide a parallel bearing surface.

18-8 Stainless Steel—18-8 stainless steel washers have good chemical resistance and may be mildly magnetic. These washers are the most corrosion-resistant option.

				Thk.
	For Screw Size	ID	Wd.	(A)	(B)	Hardness	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel



		1/4"	0.312"	0.875"	0.250"	0.125"	Rockwell B45	—	5	90845A010	000000


		5/16"	0.375"	0.875"	0.250"	0.125"	Rockwell B45	—	5	90845A015	00000
		3/8"	0.438"	1.250"	0.312"	0.125"	Rockwell B45	—	1	90845A037	0000
		1/2"	0.562"	1.250"	0.344"	0.156"	Rockwell B45	—	1	90845A038	0000
		5/8"	0.688"	1.500"	0.375"	0.125"	Rockwell B45	—	1	90845A039	00000
		3/4"	0.812"	1.500"	0.469"	0.219"	Rockwell B45	—	1	90845A040	00000
		M8	9.0 mm	22.0 mm	4.6 mm	1.5 mm	Rockwell B52	DIN 435	1	91146A170	0000
		M10	11.0 mm	22.0 mm	4.6 mm	1.5 mm	Rockwell B52	DIN 435	1	91146A180	0000
		M12	14.0 mm	26.0 mm	6.2 mm	2.0 mm	Rockwell B52	DIN 435	1	91146A190	0000
		M16	18.0 mm	32.0 mm	7.5 mm	2.5 mm	Rockwell B52	DIN 435	1	91146A200	0000
		M20	22.0 mm	40.0 mm	9.2 mm	3.0 mm	Rockwell B52	DIN 435	1	91146A210	00000


		M24	26.0 mm	56.0 mm	10.8 mm	3.0 mm	Rockwell B52	DIN 435	1	91146A230	00000

Tabbed Strut Channel Washers

Tabs keep these washers aligned with the channel during and after installation. More stable than square washers, they stay put while you fasten them. Once in place, they’re less likely to rotate if structures vibrate.

304 Stainless Steel—The choice for wet and outdoor environments, these resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

316 Stainless Steel—Superior to 304 stainless steel, these won't degrade when exposed to harsh weather, salt water, and most chemicals.

		For Channel
	For Rod Dia.	Ht.	Wd.		Each
304 Stainless Steel



		1/4"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3585T21	00000


		5/16"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3585T29	0000
		3/8"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3585T14	0000
		1/2"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3585T15	0000
		6 mm	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3585T25	0000
		10 mm	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3585T26	0000
		12 mm	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3585T27	0000


		316 Stainless Steel



				3/8"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3585T33	0000


				1/2"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	3585T34	0000