Aluminum Sealing Washers

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74 Products

Sealing Washers

Prevent leaks while distributing weight evenly under nuts and screws. These washers compress as you tighten to keep air and fluid in, and dust and contaminants out. Use them anywhere you need a tight seal, such as protecting electronics from moisture or keeping lubricants contained in machinery.

Metal

Also known as crush washers, these are made of soft metal that deforms under pressure to fill gaps around the nut or screw. Often found in oil drain valves, they withstand stress and wear better than plastic and rubber washers, but aren't as leak-resistant. Metal sealing washers are not reusable.

Aluminum—These washers are an economical alternative to copper. They have similar corrosion resistance but require more effort to crush.

	ID	OD	Thk.	Specs. Met	Pkg. Qty.		Pkg.
Aluminum


	No. 4	0.125"	0.281"	0.024" to 0.038"	—	100	000000000	000000
	No. 6	0.156"	0.281"	0.024" to 0.038"	—	100	000000000	00000
	No. 8	0.174"	0.312"	0.024" to 0.038"	—	100	000000000	00000
	No. 10	0.203"	0.375"	0.024" to 0.038"	—	100	000000000	00000
	1/4"	0.260"	0.500"	0.043" to 0.057"	—	100	000000000	00000
	5/16"	0.344"	0.625"	0.043" to 0.057"	—	100	000000000	00000
	3/8"	0.406"	0.656"	0.055" to 0.069"	—	50	000000000	00000
	1/2"	0.531"	0.812"	0.055" to 0.069"	—	50	000000000	00000
	5/8"	0.688"	0.938"	0.071" to 0.086"	—	50	000000000	00000
	3/4"	0.812"	1.062"	0.071" to 0.086"	—	25	000000000	00000
	1"	1.062"	1.375"	0.086" to 0.104"	—	10	000000000	00000
	M3	3.200 mm	6.400 mm	0.6 mm to 0.9 mm	—	100	000000000	00000
	M4	4.300 mm	8.000 mm	0.8 mm to 1.2 mm	—	100	000000000	00000
	M5	5.200 mm	9.000 mm	0.8 mm to 1.2 mm	—	100	000000000	00000
	M6	6.200 mm	9.900 mm	0.8 mm to 1.2 mm	DIN 7603	50	000000000	00000
	M6	6.200 mm	11.900 mm	0.8 mm to 1.2 mm	DIN 7603	50	000000000	00000
	M8	8.200 mm	11.900 mm	0.8 mm to 1.2 mm	DIN 7603	50	000000000	00000
	M8	8.200 mm	13.900 mm	0.8 mm to 1.2 mm	DIN 7603	10	000000000	0000
	M10	10.200 mm	13.900 mm	0.8 mm to 1.2 mm	DIN 7603	50	000000000	00000
	M10	10.200 mm	13.900 mm	1.3 mm to 1.7 mm	DIN 7603	10	000000000	0000
	M10	10.200 mm	15.900 mm	0.8 mm to 1.2 mm	DIN 7603	50	000000000	00000
	M10	10.200 mm	15.900 mm	1.3 mm to 1.7 mm	DIN 7603	10	000000000	0000
	M12	12.200 mm	15.900 mm	1.3 mm to 1.7 mm	DIN 7603	50	000000000	00000
	M12	12.200 mm	17.900 mm	1.3 mm to 1.7 mm	DIN 7603	50	000000000	00000
	M14	14.200 mm	17.900 mm	1.3 mm to 1.7 mm	DIN 7603	25	000000000	00000
	M14	14.200 mm	19.900 mm	1.3 mm to 1.7 mm	DIN 7603	25	000000000	00000
	M16	16.200 mm	19.900 mm	1.3 mm to 1.7 mm	DIN 7603	25	000000000	00000
	M16	16.200 mm	21.900 mm	1.3 mm to 1.7 mm	DIN 7603	10	000000000	00000
	M18	18.200 mm	21.900 mm	1.3 mm to 1.7 mm	DIN 7603	5	000000000	0000
	M18	18.200 mm	23.900 mm	1.3 mm to 1.7 mm	DIN 7603	10	000000000	00000
	M20	20.200 mm	23.900 mm	1.3 mm to 1.7 mm	DIN 7603	5	000000000	0000
	M20	20.200 mm	25.900 mm	1.3 mm to 1.7 mm	DIN 7603	10	000000000	00000
	M22	22.200 mm	26.900 mm	1.3 mm to 1.7 mm	DIN 7603	10	000000000	00000
	M24	24.300 mm	29.900 mm	1.8 mm to 2.2 mm	DIN 7603	10	000000000	00000
	M24	24.300 mm	31.900 mm	1.8 mm to 2.2 mm	DIN 7603	5	000000000	0000
	M26	26.300 mm	31.900 mm	1.8 mm to 2.2 mm	DIN 7603	10	000000000	00000
	M27	30.000 mm	38.000 mm	2.8 mm to 3.2 mm	—	10	000000000	00000
	M30	33.000 mm	42.000 mm	2.8 mm to 3.2 mm	—	5	000000000	00000
	M36	39.000 mm	47.500 mm	2.8 mm to 3.2 mm	—	5	000000000	00000
	M42	45.000 mm	53.000 mm	2.8 mm to 3.2 mm	—	5	000000000	00000

Bonded Sealing Washers

These washers create a stronger seal than metal or rubber alone to lock air and fluid in, while keeping dust and contaminants out. The flexible rubber layer compresses to fill gaps, while the metal backing stops the washer from squeezing through the hole. These washers are a great solution if you have a hole larger than your fastener that you need to seal. Reuse them a handful of times, as long as the material isn't damaged.

Aluminum and Neoprene—These washers are as corrosion resistant as stainless steel but not as strong.

					Temp. Range, ° F
	For Screw Size	ID	OD	Thk.	Min.	Max.	Color	Pkg. Qty.		Pkg.
Aluminum and Neoprene


		No. 10	0.200"	0.500"	0.090" to 0.120"	-40	250	Black	50	000000000	00000
		No. 12	0.240"	0.500"	0.090" to 0.120"	-40	250	Black	50	000000000	0000
		No. 14	0.275"	0.625"	0.090" to 0.120"	-40	250	Black	50	000000000	0000
		1/4"	0.275"	0.625"	0.119" to 0.154"	-40	250	Black	50	000000000	0000
		5/16"	0.330"	0.625"	0.110" to 0.145"	-40	250	Black	50	000000000	0000
		5/16"	0.330"	0.680"	0.119" to 0.154"	-40	250	Black	50	000000000	00000
		3/8"	0.434"	0.735"	0.116" to 0.151"	-40	250	Black	25	000000000	0000
		3/8"	0.434"	0.810"	0.121" to 0.156"	-40	250	Black	25	000000000	0000
		1/2"	0.532"	1.000"	0.109" to 0.144"	-40	250	Black	25	000000000	0000

Sealing Washer Assortments

Keep a collection of metal sealing washers on hand to prevent leaks while distributing weight evenly under nuts and screws. Also known as crush washers, these deform when tightened to lock air and fluid in, while keeping dust and contaminants out. They are not reusable.

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

Aluminum—These washers are an economical alternative to copper. They have similar corrosion resistance but require more effort to crush.

	Sizes Included	Specs. Met	Container Type		Each
Aluminum


	570	For M6 to M30 Screw Sizes	DIN 7603	Plastic Box	000000000	0000000

Fabric Grommets

Add a protective metal ring to a hole so rope and cable don’t tear your tarp, cover, or curtain. To install, strike a cutting punch with a mallet to create the hole, then set the grommet using either an installation punch or a press. All of these grommets can be used outdoors. Installation tools are sold separately.

Standard Washer

Aluminum—Keep large tarps and other surfaces lightweight where you're installing lots of grommets.

Grommet Trade Size—Make sure your grommet, hole, and installation tools have the same trade size.

	For Max. Material Thk.	ID	Flange Dia.	Dp. Under Flange	For Use Outdoors	Pkg. Qty.		Pkg.
Aluminum


	00	0.063"	3/16"	0.425"	0.135"	Yes	50	000000	00000
	0	0.101"	1/4"	0.545"	0.175"	Yes	50	0000000	0000
	1	0.108"	9/32"	0.687"	0.185"	Yes	50	0000000	0000
	2	0.14"	3/8"	0.815"	0.215"	Yes	50	0000000	0000
	3	0.219"	7/16"	0.97"	0.295"	Yes	50	0000000	00000
	4	0.298"	1/2"	1.05"	0.374"	Yes	50	0000000	00000