Aluminum Sealing Washers

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114 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

Sealing Grommets


Style 1	Style 2	Style 3	Style 4

The center hole seals around wire, cable, and cords to keep out debris and splashing liquid. Screw the flange onto the surface so moisture can’t leak through your panel.

Style 1

Oil-Resistant Buna-N—These resist oil and fuels better than other rubber grommets. Use them on frequently lubricated machinery and oily equipment, such as engines and pumps.

							Mounting
	ID	Flange Dia.	Overall Ht.	Temp., ° F	For Use Outdoors	Color	No. of Holes	Fasteners Included	Hole Dia.		Each
Oil-Resistant Buna-N with Aluminum Flange



		0.125"	3"	0.16"	-20 to 220	Yes	Black	4	No	1/8"	00000000	000000


		0.25"	3"	0.16"	-20 to 220	Yes	Black	4	No	1/8"	00000000	00000
		0.375"	3"	0.16"	-20 to 220	Yes	Black	4	No	1/8"	00000000	00000
		0.5"	3"	0.16"	-20 to 220	Yes	Black	4	No	1/8"	00000000	00000
		0.625"	3"	0.16"	-20 to 220	Yes	Black	4	No	1/8"	00000000	00000
		0.75"	3"	0.16"	-20 to 220	Yes	Black	4	No	1/8"	00000000	00000
		1"	3"	0.16"	-20 to 220	Yes	Black	4	No	1/8"	00000000	00000
		1"	4"	0.1"	-20 to 220	Yes	Black	4	No	1/8"	00000000	00000
		1.125"	3"	0.16"	-20 to 220	Yes	Black	4	No	1/8"	00000000	00000
		1.25"	3"	0.16"	-20 to 220	Yes	Black	4	No	1/8"	00000000	00000
		1.5"	4 1/2"	0.29"	-20 to 220	Yes	Black	6	No	1/8"	00000000	00000


		1.797"	4"	0.1"	-20 to 220	Yes	Black	4	No	1/8"	00000000	00000
		2.110"	4 1/2"	0.29"	-20 to 220	Yes	Black	6	No	1/8"	00000000	00000

Style 2

Oil-Resistant Buna-N—These resist oil and fuels better than other rubber grommets. Use them on frequently lubricated machinery and oily equipment, such as engines and pumps.

		Flange						Mounting
	ID	Lg.	Wd.	Overall Ht.	Temp., ° F	For Use Outdoors	Color	No. of Holes	Fasteners Included	Hole Dia.		Each
Oil-Resistant Buna-N with Aluminum Flange



		0.25"	5 1/4"	3"	0.16"	-20 to 220	Yes	Black	8	No	1/8"	00000000	000000


		1"	5 3/4"	3"	0.16"	-20 to 220	Yes	Black	8	No	1/8"	00000000	00000

Style 3

These grommets flex to move with the wire, so they’re good for robots, hydraulic lifts, and other machinery with repetitive movement.

Oil-Resistant Buna-N—These resist oil and fuels better than other rubber grommets. Use them on frequently lubricated machinery and oily equipment, such as engines and pumps.

							Mounting
	ID	Flange Dia.	Overall Ht.	Temp., ° F	For Use Outdoors	Color	No. of Holes	Fasteners Included	Hole Dia.		Each
Oil-Resistant Buna-N with Aluminum Flange



		13/32"	2"	1.15"	-20 to 220	Yes	Black	4	No	1/8"	00000000	000000

Style 4

The domed construction makes room for a large fitting or bundle of wires behind the hole.

Oil-Resistant Buna-N—These resist oil and fuels better than other rubber grommets. Use them on frequently lubricated machinery and oily equipment, such as engines and pumps.

							Mounting
	ID	Flange Dia.	Overall Ht.	Temp., ° F	For Use Outdoors	Color	No. of Holes	Fasteners Included	Hole Dia.		Each
Oil-Resistant Buna-N with Aluminum Flange



		13/32"	3"	1.35"	-20 to 220	Yes	Black	4	No	1/8"	00000000	000000

Split Sealing Grommets

Create a seal around wire, cable, and cords you’ve already installed. The center hole closes tightly to keep out debris and splashing liquid, and the aluminum flange screws onto the surface so moisture can’t leak through.

Oil-Resistant Buna-N—These resist oil and fuels better than other rubber grommets. Use them on frequently lubricated machinery and oily equipment, such as engines and pumps.

							Mounting
	ID	Flange Dia.	Overall Ht.	Temp., ° F	For Use Outdoors	Color	No. of Holes	Fasteners Included	Hole Dia.		Each
Oil-Resistant Buna-N with Aluminum Flange



		1/8"	3"	0.14"	-20 to 220	Yes	Black	6	No	1/8"	0000000	000000


		1/4"	3"	0.14"	-20 to 220	Yes	Black	6	No	1/8"	0000000	00000
		3/8"	3"	0.14"	-20 to 220	Yes	Black	6	No	1/8"	0000000	00000
		1/2"	3"	0.14"	-20 to 220	Yes	Black	6	No	1/8"	0000000	00000
		5/8"	3"	0.14"	-20 to 220	Yes	Black	6	No	1/8"	0000000	00000
		3/4"	3"	0.14"	-20 to 220	Yes	Black	6	No	1/8"	0000000	00000
		7/8"	3"	0.14"	-20 to 220	Yes	Black	6	No	1/8"	0000000	00000
		1"	3"	0.14"	-20 to 220	Yes	Black	6	No	1/8"	0000000	00000
		1 1/8"	3"	0.035"	-20 to 220	Yes	Black	6	No	1/8"	0000000	00000
		1 1/4"	3"	0.035"	-20 to 220	Yes	Black	6	No	1/8"	0000000	00000
		1 3/4"	3"	0.14"	-20 to 220	Yes	Black	6	No	1/8"	0000000	00000


		2 1/8"	3"	0.14"	-20 to 220	Yes	Black	6	No	1/8"	0000000	00000

Cut-to-Size Sealing Grommets


Style 1	Style 2	Style 3

Cut these grommets to match your wire, cable, or cord diameter, or leave them uncut to cover unused holes. The center hole forms a tight seal to keep out debris and splashing liquid, and the aluminum flange screws onto the surface so moisture can’t leak through.

Style 1

Oil-Resistant Buna-N—These resist oil and fuels better than other rubber grommets. Use them on frequently lubricated machinery and oily equipment, such as engines and pumps.

							Mounting
	ID	Flange Dia.	Overall Ht.	Temp., ° F	For Use Outdoors	Color	No. of Holes	Fasteners Included	Hole Dia.		Each
Oil-Resistant Buna-N with Aluminum Flange



		1/64" to 3/4"	1 1/2"	0.16"	-20 to 220	Yes	Black	4	No	1/8"	00000000	000000


		1/64" to 1"	2"	0.16"	-20 to 220	Yes	Black	4	No	1/8"	0000000	00000
		1/64" to 1 1/2"	3"	0.16"	-20 to 220	Yes	Black	4	No	1/8"	0000000	00000
		1/64" to 2"	4"	0.1"	-20 to 220	Yes	Black	4	No	1/8"	0000000	00000
		1/64" to 4"	6"	0.19"	-20 to 220	Yes	Black	4	No	1/8"	00000000	00000

Style 2

Oil-Resistant Buna-N—These resist oil and fuels better than other rubber grommets. Use them on frequently lubricated machinery and oily equipment, such as engines and pumps.

		Flange						Mounting
	ID	Lg.	Wd.	Overall Ht.	Temp., ° F	For Use Outdoors	Color	No. of Holes	Fasteners Included	Hole Dia.		Each
Oil-Resistant Buna-N with Aluminum Flange



		1/64" to 2"	5 1/4"	3"	0.16"	-20 to 220	Yes	Black	8	No	1/8"	00000000	000000

Style 3

These grommets flex to move with the wire, so they’re good for robots, hydraulic lifts, and other machinery with repetitive movement.

Oil-Resistant Buna-N—These resist oil and fuels better than other rubber grommets. Use them on frequently lubricated machinery and oily equipment, such as engines and pumps.

							Mounting
	ID	Flange Dia.	Overall Ht.	Temp., ° F	For Use Outdoors	Color	No. of Holes	Fasteners Included	Hole Dia.		Each
Oil-Resistant Buna-N with Aluminum Flange



		1/64" to 5/8"	1 1/2"	0.65"	-20 to 220	Yes	Black	4	No	1/8"	0000000	000000


		1/64" to 1 1/8"	2"	1.5"	-20 to 220	Yes	Black	4	No	1/8"	0000000	00000

Cut-to-Size Split Sealing Grommets

Cut your own hole to fit wire, cable, and cords of various sizes or a bundle with an irregular shape. These grommets create a seal around lines you’ve already installed. The center hole closes tightly to keep out debris and splashing liquid, and the aluminum flange screws onto the surface so moisture can’t leak through.

Oil-Resistant Buna-N—These resist oil and fuels better than other rubber grommets. Use them on frequently lubricated machinery and oily equipment, such as engines and pumps.

							Mounting
	ID	Flange Dia.	Overall Ht.	Temp., ° F	For Use Outdoors	Color	No. of Holes	Fasteners Included	Hole Dia.		Each
Oil-Resistant Buna-N with Aluminum Flange



		1/64" to 1"	2"	0.14"	-20 to 220	Yes	Black	4	No	0.14"	0000000	000000


		1/32" to 1 3/4"	3"	0.14"	-20 to 220	Yes	Black	6	No	0.14"	0000000	00000
		1/32" to 2 7/8"	4 1/2"	0.13"	-20 to 220	Yes	Black	6	No	0.13"	0000000	00000

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

Accessories for Grommets

Installation and Cutting Punches

Hammer-Driven

Installation

Punch

Hammer-Driven

Cutting Punch

Hammer-Driven Installation Punch—The economical choice if you’re installing a few grommets at a time. Align the grommet base, fabric, and washer on the die (included). A few sharp taps on the punch cinch the grommet in the hole. Use a rubber or rawhide mallet rather than a metal hammer to preserve the head of the punch.

Hammer-Driven Cutting Punch—Create a hole in your fabric with a few sharp mallet taps on the cutting punch. Use a rubber or rawhide mallet rather than a metal hammer to preserve the head of the punch.

	For Hole Dia.	Material		Each
Hammer-Driven Installation Punch



	00	3/16"	—	0000000	000000


	0	1/4"	—	0000000	00000
	1	9/32"	—	0000000	00000
	2	3/8"	—	0000000	00000
	3	7/16"	—	0000000	00000
	4	1/2"	—	0000000	00000


	Hammer-Driven Cutting Punch



			00	3/16"	Steel	0000000	00000


			0	1/4"	Steel	0000000	00000
			1	9/32"	Steel	0000000	00000
			2	3/8"	Steel	0000000	00000
			3	7/16"	Steel	0000000	00000
			4	1/2"	Steel	0000000	00000

Manual Presses

Manual Press

Manual Press—Saves time and effort if you’re frequently installing or replacing grommets. Install the required two-piece die set (sold separately) on the press, align the grommet in the hole, and squeeze the handle. For a longer service life, lubricate the handle and plunger with a drop of oil.

		Throat
	Max. Opening	Dp.	Wd.	Material		Each
Manual Press



		7/8"	3 1/4"	1 3/4"	Aluminum	000000000	0000000

Grommet Dies

For Grommet Trade Size	Hole Size	Each
00	3/16"	000000
0	1/4"	00000
1	9/32"	00000
2	3/8"	00000
3	7/16"	00000