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"	—	000000000	00000


		1/4"	0.313"	2.000"	0.235" to 0.265"	—	000000000	0000
		5/16"	0.343"	2.000"	0.056" to 0.063"	—	000000000	0000
		3/8"	0.438"	2.000"	0.235" to 0.265"	Material Certificate	000000000	0000
		7/16"	0.500"	2.000"	0.235" to 0.265"	—	000000000	0000
		1/2"	0.563"	2.000"	0.112" to 0.128"	—	000000000	00000
		1/2"	0.563"	2.000"	0.235" to 0.265"	Material Certificate	000000000	0000
		1/2"	0.563"	3.000"	0.235" to 0.265"	Material Certificate	000000000	00000
		5/8"	0.688"	2.000"	0.112" to 0.128"	—	000000000	00000
		5/8"	0.688"	2.000"	0.235" to 0.265"	Material Certificate	000000000	0000
		5/8"	0.688"	3.000"	0.235" to 0.265"	—	000000000	00000


		3/4"	0.813"	2.000"	0.112" to 0.128"	—	000000000	00000
		3/4"	0.813"	2.000"	0.235" to 0.265"	—	000000000	0000
		3/4"	0.813"	3.000"	0.235" to 0.265"	Material Certificate	000000000	00000
		7/8"	0.938"	2.000"	0.235" to 0.265"	—	000000000	0000
		7/8"	0.938"	3.000"	0.235" to 0.265"	Material Certificate	000000000	00000
		1"	1.063"	2.000"	0.235" to 0.265"	—	000000000	0000
		1"	1.063"	3.000"	0.235" to 0.265"	Material Certificate	000000000	00000
		1 1/4"	1.313"	2.000"	0.235" to 0.265"	—	000000000	0000
		1 1/4"	1.313"	3.000"	0.220" to 0.280"	Material Certificate	000000000	00000
		M6	9.0 mm	50.0 mm	6.0 mm	—	000000000	00000


		M8	11.0 mm	50.0 mm	6.0 mm	—	000000000	00000
		M10	13.0 mm	50.0 mm	6.0 mm	Material Certificate	000000000	00000
		M12	16.0 mm	50.0 mm	6.0 mm	Material Certificate	000000000	00000
		M14	18.0 mm	50.0 mm	6.0 mm	Material Certificate	000000000	00000
		M16	22.0 mm	50.0 mm	6.0 mm	Material Certificate	000000000	00000
		M20	26.0 mm	50.0 mm	6.0 mm	Material Certificate	000000000	00000
		M22	28.0 mm	50.0 mm	6.0 mm	Material Certificate	000000000	00000
		M24	32.0 mm	50.0 mm	6.0 mm	Material Certificate	000000000	00000
		M30	38.0 mm	50.0 mm	6.0 mm	Material Certificate	000000000	00000


		Highly Corrosion-Resistant 316 Stainless Steel



				No. 8	0.187"	0.500"	0.048" to 0.075"	—	000000000	0000


				No. 8	0.187"	0.547"	0.034" to 0.060"	—	000000000	0000
				No. 8	0.188"	2.000"	0.056" to 0.063"	—	000000000	0000
				No. 10	0.219"	2.000"	0.056" to 0.063"	—	000000000	0000
				No. 12	0.265"	0.438"	0.048" to 0.075"	—	000000000	0000
				1/4"	0.285"	0.500"	0.114" to 0.126"	—	000000000	0000
				1/4"	0.285"	2.000"	0.056" to 0.063"	—	000000000	0000
				5/16"	0.375"	2.000"	0.090" to 0.115"	—	000000000	0000
				3/8"	0.406"	0.750"	0.114" to 0.126"	—	000000000	0000
				3/8"	0.406"	0.813"	0.114" to 0.126"	—	000000000	0000
				3/8"	0.438"	2.000"	0.115" to 0.135"	—	000000000	0000


				1/2"	0.530"	0.813"	0.115" to 0.135"	—	000000000	0000
				1/2"	0.531"	1.250"	0.100" to 0.111"	—	000000000	0000
				1/2"	0.562"	2.000"	0.020" to 0.042"	—	000000000	0000
				1/2"	0.562"	2.000"	0.090" to 0.134"	—	000000000	0000
5/8"				0.656"	1.250"	0.090" to 0.115"	—	000000000	0000
3/4"	0.812"			1.250"	0.100" to 0.111"	—	000000000	0000
3/4"	0.812"			2.000"	0.114" to 0.126"	—	000000000	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"	—	50	000000000	000000


	No. 6	0.143"	0.400"	0.220"	0.028" to 0.034"	—	50	000000000	00000
	No. 6	0.147"	0.375"	0.330"	0.028" to 0.034"	—	50	000000000	00000
	No. 6	0.158"	0.438"	0.375"	0.036" to 0.044"	—	50	000000000	00000
	No. 8	0.180"	0.750"	0.375"	0.046" to 0.054"	—	25	000000000	00000
	No. 10	0.203"	0.875"	0.438"	0.027" to 0.033"	—	25	000000000	00000
	No. 12	0.234"	1.000"	0.500"	0.036" to 0.045"	—	25	000000000	00000
	1/4"	0.281"	1.250"	0.625"	0.043" to 0.057"	Material Certificate	10	000000000	00000
	5/16"	0.344"	1.500"	0.750"	0.043" to 0.057"	—	5	000000000	00000
	3/8"	0.406"	1.500"	0.750"	0.056" to 0.064"	—	5	000000000	00000
	1/2"	0.531"	2.000"	1.000"	0.056" to 0.064"	—	5	000000000	00000


	5/8"	0.687"	2.250"	1.125"	0.071" to 0.085"	—	1	000000000	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"	0000000	00000	100	00000000	0000000


		5/16"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000	100	00000000	000000
		3/8"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000	100	00000000	000000
		1/2"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000	100	00000000	000000
		5/8"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000	50	00000000	000000
		3/4"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000	25	00000000	000000
		7/8"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000	25	00000000	000000
		8 mm	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000	50	00000000	000000
		10 mm	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000	50	00000000	000000
		12 mm	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000	50	00000000	000000


		316 Stainless Steel



				1/4"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000	100	00000000	000000


				3/8"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000	50	00000000	000000
				1/2"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000	50	00000000	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	000000000	000000


	No. 10	0.226"	0.500"	0.043" to 0.053"	50	000000000	00000
	No. 10	0.253"	0.561"	0.028" to 0.034"	50	000000000	00000
	1/4"	0.320"	0.680"	0.055" to 0.065"	25	000000000	00000
	5/16"	0.385"	0.750"	0.043" to 0.053"	25	000000000	00000
	3/8"	0.392"	0.900"	0.085" to 0.095"	10	000000000	00000
	3/8"	0.405"	0.700"	0.055" to 0.065"	25	000000000	00000
	7/16"	0.517"	0.937"	0.055" to 0.065"	25	000000000	00000
	1/2"	0.555"	1.000"	0.055" to 0.065"	10	000000000	00000
	1/2"	0.617"	1.125"	0.055" to 0.065"	10	000000000	00000
	5/8"	0.650"	1.500"	0.115" to 0.125"	5	000000000	00000


	5/8"	0.700"	1.250"	0.055" to 0.065"	10	000000000	00000
	3/4"	0.812"	1.375"	0.055" to 0.065"	5	000000000	0000

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"	0000000	00000


		5/16"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000
		3/8"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000
		1/2"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000
		6 mm	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000
		10 mm	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000
		12 mm	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000


		316 Stainless Steel



				3/8"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	0000


				1/2"	13/16", 1 5/8", 2 7/16", 3 1/4"	1 5/8"	0000000	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	000000000	000000


		5/16"	0.375"	0.875"	0.250"	0.125"	Rockwell B45	—	5	000000000	00000
		3/8"	0.438"	1.250"	0.312"	0.125"	Rockwell B45	—	1	000000000	0000
		1/2"	0.562"	1.250"	0.344"	0.156"	Rockwell B45	—	1	000000000	0000
		5/8"	0.688"	1.500"	0.375"	0.125"	Rockwell B45	—	1	000000000	00000
		3/4"	0.812"	1.500"	0.469"	0.219"	Rockwell B45	—	1	000000000	00000
		M8	9.0 mm	22.0 mm	4.6 mm	1.5 mm	Rockwell B52	DIN 435	1	000000000	0000
		M10	11.0 mm	22.0 mm	4.6 mm	1.5 mm	Rockwell B52	DIN 435	1	000000000	0000
		M12	14.0 mm	26.0 mm	6.2 mm	2.0 mm	Rockwell B52	DIN 435	1	000000000	0000
		M16	18.0 mm	32.0 mm	7.5 mm	2.5 mm	Rockwell B52	DIN 435	1	000000000	0000
		M20	22.0 mm	40.0 mm	9.2 mm	3.0 mm	Rockwell B52	DIN 435	1	000000000	00000


		M24	26.0 mm	56.0 mm	10.8 mm	3.0 mm	Rockwell B52	DIN 435	1	000000000	00000