Rubber-Backed Washers | McMaster-Carr

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

Yes

Export Control Classification Number (ECCN)

EAR99

Maximum Pressure for Fluids

Less than 3,000 psi

3,000 psi to 3,999 psi

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1,000 psi to 2,999 psi

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Not Rated

Food Industry Standard

3-A Certified 18-03

FDA Compliant 21 CFR 177.2600

NSF/ANSI 51

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220 Products

Performance

Pressure Rated

Prevent leaks in pumps, hydraulic systems, and other pressurized lines

95 products

Oil Resistant

Best for lubricated equipment, such as engines and generators

69 products

Performance

Weather Resistant

Withstand long-term exposure to sunlight, rain, and ozone

179 products

Chemical Resistant

Stands up to solvents, cleaners, and other harsh substances

28 products

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.

18-8 Stainless Steel and Neoprene—Withstand prolonged exposure to wet and outdoor environments without rusting.

Galvanized Steel and Neoprene—Combine the strength of steel with the rust resistance of stainless steel. These washers are an economical alternative to 18-8 stainless steel in wet and outdoor environments. However, they typically have a shorter lifespan since the galvanized coating wears off over time.

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.
18-8 Stainless Steel and Neoprene



		No. 2	0.094"	0.188"	0.082" to 0.098"	-40	250	Black	10	94709A147	000000


		No. 2	0.094"	0.250"	0.175" to 0.210"	-40	250	Black	5	94709A137	00000
		No. 4	0.120"	0.250"	0.065" to 0.100"	-40	250	Black	1	94709A121	0000
		No. 4	0.125"	0.250"	0.088" to 0.106"	-40	250	Black	5	94709A148	0000
		No. 4	0.125"	0.312"	0.175" to 0.210"	-40	250	Black	5	94709A138	00000
		No. 5	0.140"	0.312"	0.164" to 0.199"	-40	250	Black	5	94709A139	00000
		No. 6	0.150"	0.375"	0.084" to 0.114"	-40	250	Black	100	94709A111	00000
		No. 6	0.156"	0.312"	0.167" to 0.202"	-40	250	Black	5	94709A141	00000
		No. 6	0.156"	0.438"	0.096" to 0.115"	-40	250	Black	5	94709A142	00000
		No. 8	0.180"	0.375"	0.084" to 0.114"	-40	250	Black	100	94709A112	00000
		No. 8	0.180"	0.500"	0.084" to 0.114"	-40	250	Black	100	94709A211	00000


		No. 8	0.188"	0.375"	0.096" to 0.115"	-40	250	Black	5	94709A149	00000
		No. 8	0.188"	0.438"	0.096" to 0.135"	-40	250	Black	5	94709A143	00000
		No. 10	0.200"	0.375"	0.084" to 0.114"	-40	250	Black	100	94709A113	00000
		No. 10	0.200"	0.500"	0.084" to 0.114"	-40	250	Black	100	94709A212	00000
		No. 10	0.200"	0.625"	0.084" to 0.114"	-40	250	Black	50	94709A315	00000
		No. 10	0.200"	0.735"	0.122" to 0.157"	-40	250	Black	10	94709A122	0000
		No. 10	0.200"	1.125"	0.084" to 0.114"	-40	250	Black	5	94709A613	0000
		No. 10	0.203"	0.406"	0.096" to 0.115"	-40	250	Black	5	94709A144	00000
		No. 10	0.250"	0.562"	0.096" to 0.135"	-40	250	Black	3	94709A151	00000
		No. 12	0.240"	0.375"	0.084" to 0.114"	-40	250	Black	100	94709A114	00000


		No. 12	0.240"	0.500"	0.084" to 0.114"	-40	250	Black	100	94709A213	00000
		No. 12	0.240"	0.562"	0.109" to 0.144"	-40	250	Black	25	94709A123	0000
		No. 12	0.240"	0.625"	0.084" to 0.114"	-40	250	Black	50	94709A316	00000
		No. 12	0.240"	0.750"	0.084" to 0.114"	-40	250	Black	25	94709A415	0000
		1/4"	0.260"	0.500"	0.084" to 0.114"	-40	250	Black	100	94709A214	00000
		1/4"	0.275"	0.625"	0.084" to 0.114"	-40	250	Black	50	94709A317	00000
		1/4"	0.275"	0.750"	0.084" to 0.114"	-40	250	Black	25	94709A416	0000
		1/4"	0.275"	1.000"	0.084" to 0.114"	-40	250	Black	10	94709A119	0000
		1/4"	0.281"	0.500"	0.116" to 0.141"	-40	250	Black	3	94709A145	00000
		1/4"	0.281"	1.000"	0.116" to 0.141"	-40	250	Black	1	94709A146	00000


		1/4"	0.312"	0.750"	0.111" to 0.150"	-40	250	Black	1	94709A152	0000
		5/16"	0.317"	0.625"	0.116" to 0.141"	-40	250	Black	3	94709A153	00000
		5/16"	0.330"	0.625"	0.084" to 0.114"	-40	250	Black	50	94709A318	00000
		5/16"	0.330"	0.750"	0.084" to 0.114"	-40	250	Black	25	94709A417	0000
		5/16"	0.330"	0.875"	0.123" to 0.158"	-40	250	Black	10	94709A124	0000
		5/16"	0.330"	1.125"	0.109" to 0.144"	-40	250	Black	5	94709A126	0000
		3/8"	0.400"	0.625"	0.104" to 0.139"	-40	250	Black	25	94709A127	00000
		3/8"	0.406"	1.000"	0.116" to 0.141"	-40	250	Black	1	94709A154	00000
		3/8"	0.434"	0.750"	0.084" to 0.114"	-40	250	Black	25	94709A418	0000
		3/8"	0.434"	0.810"	0.113" to 0.148"	-40	250	Black	10	94709A128	0000


		3/8"	0.434"	1.000"	0.084" to 0.114"	-40	250	Black	10	94709A516	0000
		3/8"	0.434"	1.250"	0.110" to 0.145"	-40	250	Black	1	94709A129	0000
		7/16"	0.475"	0.875"	0.114" to 0.149"	-40	250	Black	10	94709A131	0000
		1/2"	0.531"	1.000"	0.116" to 0.141"	-40	250	Black	1	94709A155	00000
		1/2"	0.531"	1.250"	0.150" to 0.182"	-40	250	Black	1	94709A156	00000
		1/2"	0.532"	1.000"	0.084" to 0.114"	-40	250	Black	10	94709A518	0000
		1/2"	0.532"	1.062"	0.103" to 0.138"	-40	250	Black	10	94709A132	00000
		1/2"	0.532"	1.375"	0.110" to 0.145"	-40	250	Black	1	94709A133	0000
		9/16"	0.600"	1.125"	0.107" to 0.142"	-40	250	Black	5	94709A134	0000
		5/8"	0.650"	1.188"	0.084" to 0.114"	-40	250	Black	5	94709A526	00000

5/8"	0.656"	1.250"	0.150" to 0.182"	-40	250	Black	1	94709A157	00000
3/4"	0.810"	1.500"	0.084" to 0.114"	-40	250	Black	5	94709A531	00000
3/4"	0.810"	1.750"	0.099" to 0.134"	-40	250	Black	1	94709A135	0000
7/8"	0.910"	1.500"	0.084" to 0.114"	-40	250	Black	5	94709A536	00000
1"	1.040"	2.000"	0.084" to 0.114"	-40	250	Black	1	94709A541	0000
1 1/4"	1.275"	2.500"	0.102" to 0.137"	-40	250	Black	1	94709A136	0000

Galvanized Steel and Neoprene



		No. 4	0.120"	0.250"	0.065" to 0.100"	-40	250	Black	25	94708A128	0000


		No. 4	0.120"	0.310"	0.104" to 0.139"	-40	250	Black	100	94708A121	0000
		No. 6	0.150"	0.375"	0.086" to 0.116"	-40	250	Black	100	94708A111	0000
		No. 8	0.180"	0.375"	0.086" to 0.116"	-40	250	Black	100	94708A112	0000
		No. 8	0.180"	0.434"	0.108" to 0.143"	-40	250	Black	100	94708A122	0000
		No. 8	0.180"	0.500"	0.086" to 0.116"	-40	250	Black	100	94708A211	0000
		No. 10	0.200"	0.375"	0.086" to 0.116"	-40	250	Black	100	94708A113	0000
		No. 10	0.200"	0.500"	0.086" to 0.116"	-40	250	Black	100	94708A212	0000
		No. 10	0.200"	0.500"	0.111" to 0.146"	-40	250	Black	100	94708A129	0000
		No. 10	0.200"	0.625"	0.086" to 0.116"	-40	250	Black	100	94708A311	0000
		No. 10	0.200"	0.735"	0.125" to 0.160"	-40	250	Black	50	94708A131	0000


		No. 10	0.200"	1.125"	0.086" to 0.116"	-40	250	Black	25	94708A613	00000
		No. 12	0.240"	0.375"	0.086" to 0.116"	-40	250	Black	100	94708A114	0000
		No. 12	0.240"	0.500"	0.086" to 0.116"	-40	250	Black	100	94708A213	0000
		No. 12	0.240"	0.625"	0.086" to 0.116"	-40	250	Black	100	94708A312	0000
		No. 12	0.240"	0.750"	0.086" to 0.116"	-40	250	Black	100	94708A411	00000
		1/4"	0.260"	0.500"	0.086" to 0.116"	-40	250	Black	100	94708A214	0000
		1/4"	0.275"	0.625"	0.086" to 0.116"	-40	250	Black	100	94708A313	0000
		1/4"	0.275"	0.625"	0.114" to 0.149"	-40	250	Black	100	94708A133	0000
		1/4"	0.275"	0.735"	0.121" to 0.156"	-40	250	Black	50	94708A132	0000
		1/4"	0.275"	0.750"	0.086" to 0.116"	-40	250	Black	100	94708A412	00000


		1/4"	0.275"	1.000"	0.086" to 0.116"	-40	250	Black	50	94708A119	00000
		5/16"	0.330"	0.625"	0.086" to 0.116"	-40	250	Black	100	94708A314	0000
		5/16"	0.330"	0.750"	0.086" to 0.116"	-40	250	Black	100	94708A413	00000
		5/16"	0.330"	0.875"	0.126" to 0.161"	-40	250	Black	25	94708A123	00000
		5/16"	0.330"	1.125"	0.112" to 0.147"	-40	250	Black	10	94708A135	0000
		3/8"	0.400"	1.000"	0.108" to 0.143"	-40	250	Black	25	94708A136	0000
		3/8"	0.400"	1.250"	0.114" to 0.149"	-40	250	Black	10	94708A137	0000
		3/8"	0.434"	0.750"	0.086" to 0.116"	-40	250	Black	100	94708A414	00000
		3/8"	0.434"	0.810"	0.116" to 0.151"	-40	250	Black	25	94708A124	0000
		3/8"	0.434"	1.000"	0.086" to 0.116"	-40	250	Black	50	94708A516	00000


		7/16"	0.475"	0.875"	0.117" to 0.152"	-40	250	Black	50	94708A125	00000
		1/2"	0.532"	1.000"	0.086" to 0.116"	-40	250	Black	50	94708A517	00000
		1/2"	0.532"	1.000"	0.104" to 0.139"	-40	250	Black	25	94708A126	0000
		1/2"	0.532"	1.375"	0.114" to 0.149"	-40	250	Black	5	94708A127	0000
		5/8"	0.650"	1.188"	0.086" to 0.116"	-40	250	Black	10	94708A525	0000
		5/8"	0.650"	1.250"	0.108" to 0.143"	-40	250	Black	10	94708A138	0000
		3/4"	0.810"	1.500"	0.086" to 0.116"	-40	250	Black	10	94708A530	00000
		7/8"	0.910"	1.500"	0.086" to 0.116"	-40	250	Black	10	94708A535	00000
		7/8"	0.910"	1.750"	0.101" to 0.136"	-40	250	Black	5	94708A139	0000
		1"	1.040"	2.000"	0.086" to 0.116"	-40	250	Black	5	94708A540	0000


		Aluminum and Neoprene



				No. 10	0.200"	0.500"	0.090" to 0.120"	-40	250	Black	50	94240A110	0000


				No. 12	0.240"	0.500"	0.090" to 0.120"	-40	250	Black	50	94240A120	0000
				No. 14	0.275"	0.625"	0.090" to 0.120"	-40	250	Black	50	94240A130	0000
				1/4"	0.275"	0.625"	0.119" to 0.154"	-40	250	Black	50	94240A111	0000
5/16"				0.330"	0.625"	0.110" to 0.145"	-40	250	Black	50	94240A117	0000
5/16"	0.330"			0.680"	0.119" to 0.154"	-40	250	Black	50	94240A112	00000
3/8"	0.434"			0.735"	0.116" to 0.151"	-40	250	Black	25	94240A118	0000
3/8"	0.434"			0.810"	0.121" to 0.156"	-40	250	Black	25	94240A113	0000
1/2"	0.532"			1.000"	0.109" to 0.144"	-40	250	Black	25	94240A119	0000

Washdown Bonded Sealing Washers

Maintain the washdown rating of your enclosure, even after drilling holes in it. These washers protect against high-volume jets of water, as well as dirt, ice, oil, and coolant. The flexible rubber layer compresses to fill gaps, while the metal backing stops the washer from squeezing through the hole. Reuse these washers a handful of times, as long as the material isn't damaged.

18-8 Stainless Steel and EPDM—The best choice for outdoor environments, these washers withstand long-term exposure to sunlight, rain, and ozone.

High-Temperature 18-8 Stainless Steel and Silicone—These washers resist freezing and scorching temperatures without deforming or losing strength.

					Max. Pressure, psi		Temp. Range, ° F					Each
	For Screw Size	ID	OD	Thk.	For Fluids	For Gases	Min.	Max.	Color	For Enclosure Rating		1-24	25-99	100-Up
18-8 Stainless Steel and EPDM



		No. 10	0.180"	0.496"	0.078" to 0.126"	Not Rated	Not Rated	-30	200	Black	NEMA 3S, NEMA 4X, NEMA 12	92527A110	00000	00000	00000


		1/4"	0.210"	0.496"	0.078" to 0.126"	Not Rated	Not Rated	-30	200	Black	NEMA 3S, NEMA 4X, NEMA 12	92527A120	0000	0000	0000
		5/16"	0.275"	0.625"	0.085" to 0.133"	Not Rated	Not Rated	-30	200	Black	NEMA 3S, NEMA 4X, NEMA 12	92527A130	0000	0000	0000
		3/8"	0.325"	0.725"	0.095" to 0.143"	Not Rated	Not Rated	-30	200	Black	NEMA 3S, NEMA 4X, NEMA 12	92527A140	0000	0000	0000


		High-Temperature 18-8 Stainless Steel and Silicone



				No. 6	0.123"	0.55"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A120	0000	0000	0000


				No. 6	0.123"	1"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A126	0000	0000	0000
				No. 8	0.175"	0.55"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A121	0000	0000	0000
				No. 8	0.175"	1"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A104	0000	0000	0000
				No. 8	0.175"	1.5"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A130	00000	0000	0000
				No. 10	0.2"	0.55"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A122	0000	0000	0000
				No. 10	0.2"	1"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A105	0000	0000	0000
				1/4"	0.265"	0.75"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A123	0000	0000	0000
				1/4"	0.265"	1"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A107	0000	0000	0000
				1/4"	0.265"	1.5"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A132	00000	0000	0000
				5/16"	0.325"	0.75"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A124	0000	0000	0000


				5/16"	0.325"	1"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A111	0000	0000	0000
				5/16"	0.325"	1.5"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A133	00000	0000	0000
				3/8"	0.385"	0.75"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A125	0000	0000	0000
				3/8"	0.385"	1"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A112	0000	0000	0000
				3/8"	0.385"	1.5"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A134	00000	0000	0000
				7/16"	0.422"	1"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A127	0000	0000	0000
				7/16"	0.422"	1.5"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A135	00000	0000	0000
				1/2"	0.485"	1"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A128	0000	0000	0000
				1/2"	0.485"	1.5"	0.047" to 0.109"	100	100	-100	400	Green	IP66, IP68	91195A136	00000	0000	0000
				M3	2.9 mm	14 mm	2 mm to 2.1 mm	100	100	-100	400	Red	IP66, IP68	91195A137	0000	0000	0000


				M3	2.9 mm	25.4 mm	2 mm to 2.1 mm	100	100	-100	400	Red	IP66, IP68	91195A138	0000	0000	0000
				M4	3.9 mm	14 mm	2 mm to 2.1 mm	100	100	-100	400	Red	IP66, IP68	91195A139	0000	0000	0000
				M4	3.9 mm	25.4 mm	2 mm to 2.1 mm	100	100	-100	400	Red	IP66, IP68	91195A140	0000	0000	0000
				M5	4.9 mm	14 mm	2 mm to 2.1 mm	100	100	-100	400	Red	IP66, IP68	91195A141	0000	0000	0000
				M5	4.9 mm	19.1 mm	2 mm to 2.1 mm	100	100	-100	400	Red	IP66, IP68	91195A142	0000	0000	0000
				M5	4.9 mm	25.4 mm	2 mm to 2.1 mm	100	100	-100	400	Red	IP66, IP68	91195A143	0000	0000	0000
				M6	5.9 mm	19.1 mm	2 mm to 2.1 mm	100	100	-100	400	Red	IP66, IP68	91195A144	0000	0000	0000
				M6	5.9 mm	25.4 mm	2 mm to 2.1 mm	100	100	-100	400	Red	IP66, IP68	91195A145	0000	0000	0000
				M8	7.8 mm	19.1 mm	2 mm to 2.1 mm	100	100	-100	400	Red	IP66, IP68	91195A146	0000	0000	0000
				M8	7.8 mm	25.4 mm	2 mm to 2.1 mm	100	100	-100	400	Red	IP66, IP68	91195A147	0000	0000	0000


				M10	9.8 mm	25.4 mm	2 mm to 2.1 mm	100	100	-100	400	Red	IP66, IP68	91195A148	0000	0000	0000
				M12	11.8 mm	25.4 mm	2 mm to 2.1 mm	100	100	-100	400	Red	IP66, IP68	91195A149	0000	0000	0000

High-Pressure Bonded Sealing Washers

Tested to hold up to high pressures, these washers create the strongest seal of all to lock in air and fluid and keep equipment running efficiently. They are often used on flanged connections to prevent leaks in pumps, hydraulic systems, compressors, and other pressurized lines. The flexible rubber or plastic layer compresses to fills gaps, while the metal backing stops the washer from squeezing through the hole.

For Screw Heads

Fit under screw heads to stop leaks. These washers seal best on screws that aren't threaded all the way up to the head. Reuse them a handful of times, as long as the material isn't damaged.

Oil-Resistant Zinc-Plated Steel and Buna-N—These washers won't swell or soften when they touch oil, grease, and fuel. However, they will degrade if exposed to synthetic lubricants. They are also are more susceptible to rusting than 18-8 and 316 stainless steel.

Chemical-Resistant 18-8 Stainless Steel and Fluoroelastomer—These washers resist corrosion better than zinc-plated steel, so they're less likely to rust in wet and outdoor environments. The seal withstands high temperatures and won't degrade when exposed to acids, alcohols, solvents, synthetic lubricants, and harsh detergents.

					Max. Pressure, psi		Temp. Range, ° F
	For Screw Size	ID	OD	Thk.	For Fluids	For Gases	Min.	Max.	Color	Pkg. Qty.		Pkg.
Oil-Resistant Zinc-Plated Steel and Buna-N



		No. 4	0.102"	0.25"	0.035" to 0.045"	7,000	200	-10	240	Black	10	93783A005	000000


		No. 6	0.13"	0.385"	0.036" to 0.044"	10,800	200	-40	225	Black	10	93783A007	00000
		No. 8	0.156"	0.385"	0.036" to 0.044"	8,000	200	-40	225	Black	1	93783A009	0000
		No. 10	0.18"	0.443"	0.045" to 0.055"	6,200	200	-40	225	Black	1	93783A011	0000
		1/4"	0.24"	0.505"	0.045" to 0.055"	5,000	200	-40	225	Black	10	93783A029	00000
		5/16"	0.301"	0.603"	0.045" to 0.055"	3,600	200	-40	225	Black	10	93783A030	00000
		3/8"	0.364"	0.666"	0.045" to 0.055"	3,400	200	-40	225	Black	10	93783A031	00000
		7/16"	0.427"	0.76"	0.045" to 0.055"	3,600	200	-40	225	Black	5	93783A032	00000
		1/2"	0.49"	0.88"	0.045" to 0.055"	4,200	200	-40	225	Black	10	93783A033	00000
		9/16"	0.552"	1.067"	0.045" to 0.055"	6,600	200	-30	225	Black	5	93783A034	00000
		5/8"	0.615"	1.193"	0.045" to 0.055"	7,500	200	-40	225	Black	5	93783A035	00000


		3/4"	0.74"	1.322"	0.059" to 0.069"	5,700	200	-40	225	Black	5	93783A036	00000
		7/8"	0.864"	1.51"	0.059" to 0.069"	6,000	200	-30	225	Black	1	93783A046	0000
		1"	0.988"	1.76"	0.059" to 0.069"	7,000	200	-40	225	Black	1	93783A051	0000
		1 1/8"	1.106"	1.885"	0.059" to 0.069"	4,900	200	-10	240	Black	1	93783A056	0000
		1 1/4"	1.229"	2.01"	0.059" to 0.069"	4,600	200	-10	240	Black	1	93783A061	0000
		M2	1.8 mm	4.5 mm	0.9 mm to 1.1 mm	7,300	200	-10	240	Black	10	93786A501	00000
		M2.5	2.2 mm	5.0 mm	0.9 mm to 1.1 mm	6,600	200	-10	240	Black	10	93786A502	00000
		M3	2.7 mm	6.0 mm	0.9 mm to 1.1 mm	6,400	200	-10	240	Black	10	93786A503	00000
		M4	3.7 mm	7.0 mm	0.9 mm to 1.1 mm	5,500	200	-10	240	Black	10	93786A504	00000
		M5	4.8 mm	9.8 mm	0.9 mm to 1.2 mm	15,200	200	-30	220	Black	5	93786A100	00000


		M6	5.8 mm	11.3 mm	1.1 mm to 1.4 mm	12,800	200	-30	220	Black	5	93786A125	00000
		M8	7.8 mm	13.5 mm	1.1 mm to 1.4 mm	7,900	200	-30	220	Black	5	93786A150	00000
		M10	9.7 mm	15.3 mm	1.1 mm to 1.4 mm	7,200	200	-30	220	Black	5	93786A175	00000
		M12	11.7 mm	19.3 mm	1.1 mm to 1.4 mm	7,100	200	-30	220	Black	5	93786A200	00000
		M14	13.7 mm	22.4 mm	1.1 mm to 1.4 mm	8,000	200	-30	220	Black	5	93786A225	00000
		M16	15.7 mm	27.1 mm	1.1 mm to 1.4 mm	12,500	200	-30	220	Black	5	93786A250	00000
		M20	19.6 mm	33.3 mm	1.5 mm to 1.8 mm	4,900	200	-10	240	Black	5	93786A300	00000
		M22	21.6 mm	31.4 mm	1.1 mm to 1.4 mm	3,700	200	-10	240	Black	5	93786A325	00000
		M24	23.7 mm	43.9 mm	1.5 mm to 1.8 mm	5,500	200	-10	240	Black	1	93786A350	0000


		Chemical-Resistant 18-8 Stainless Steel and Fluoroelastomer



				No. 6	0.13"	0.385"	0.035" to 0.045"	4,900	200	0	390	Black	10	90467A106	00000


				No. 8	0.156"	0.385"	0.035" to 0.045"	4,400	200	0	390	Black	10	90467A108	00000
				No. 10	0.18"	0.443"	0.042" to 0.052"	4,400	200	0	390	Black	5	90467A110	00000
				1/4"	0.24"	0.505"	0.045" to 0.055"	3,900	200	0	390	Black	5	90467A131	00000
				5/16"	0.301"	0.603"	0.045" to 0.055"	3,700	200	0	390	Black	5	90467A132	00000
				3/8"	0.364"	0.666"	0.045" to 0.055"	3,400	200	0	390	Black	5	90467A133	00000
				7/16"	0.427"	0.76"	0.045" to 0.055"	3,200	200	0	390	Black	5	90467A134	00000
				1/2"	0.49"	0.88"	0.045" to 0.055"	3,300	200	0	390	Black	1	90467A135	0000
				9/16"	0.552"	1.067"	0.045" to 0.055"	3,600	200	0	390	Black	1	90467A136	0000
				5/8"	0.615"	1.193"	0.045" to 0.055"	3,600	200	0	390	Black	1	90467A137	00000
				3/4"	0.74"	1.322"	0.059" to 0.069"	3,300	200	0	390	Black	1	90467A138	00000


				7/8"	0.864"	1.51"	0.059" to 0.069"	3,200	200	0	390	Black	1	90467A139	00000
				1"	0.988"	1.76"	0.059" to 0.069"	3,200	200	0	390	Black	1	90467A141	00000
				M5	4.8 mm	9.8 mm	0.9 mm to 1.1 mm	3,700	200	0	390	Black	10	90467A205	00000
				M6	5.8 mm	11.3 mm	1.1 mm to 1.4 mm	3,600	200	0	390	Black	10	90467A206	00000
M8				7.8 mm	13.5 mm	1.1 mm to 1.4 mm	3,100	200	0	390	Black	5	90467A208	00000
M10	9.7 mm			15.3 mm	1.1 mm to 1.4 mm	2,700	200	0	390	Black	5	90467A210	00000
M12	11.7 mm			19.3 mm	1.1 mm to 1.4 mm	2,900	200	0	390	Black	5	90467A212	00000
M14	13.6 mm			22.3 mm	1.1 mm to 1.4 mm	2,900	200	0	390	Black	1	90467A214	0000
M16	15.6 mm			27.1 mm	1.1 mm to 1.4 mm	3,100	200	0	390	Black	1	90467A216	0000
M20	19.6 mm			33.3 mm	1.5 mm to 1.8 mm	3,000	200	0	390	Black	1	90467A220	00000

For Nuts

Commonly used under nuts, these washers wedge into threads to prevent liquids or gases from trickling along the length of the screw. Reuse them a handful of times, as long as the material isn't damaged.

					Max. Pressure		Temp. Range, ° F
	For Screw Size	ID	OD	Thk.	For Fluids, psi	For Gases	Min.	Max.	Color	Pkg. Qty.		Pkg.
Oil-Resistant Zinc-Plated Steel and Buna-N



		No. 6	0.141"	0.406"	0.045" to 0.055"	2,000	Not Rated	-30	220	Black	5	93781A008	000000


		No. 8	0.167"	0.406"	0.045" to 0.055"	2,000	Not Rated	-30	220	Black	5	93781A010	00000
		No. 10	0.194"	0.469"	0.045" to 0.055"	2,000	Not Rated	-30	220	Black	5	93781A011	00000
		1/4"	0.255"	0.562"	0.045" to 0.055"	5,000	Not Rated	-30	220	Black	5	93781A029	00000
		5/16"	0.319"	0.687"	0.059" to 0.069"	5,000	Not Rated	-30	220	Black	5	93781A037	00000
		3/8"	0.383"	0.750"	0.059" to 0.069"	5,000	Not Rated	-30	220	Black	5	93781A038	00000
		7/16"	0.447"	0.906"	0.073" to 0.083"	5,000	Not Rated	-30	220	Black	5	93781A032	00000
		1/2"	0.510"	1.000"	0.073" to 0.083"	5,000	Not Rated	-30	220	Black	5	93781A033	00000
		5/8"	0.638"	1.187"	0.089" to 0.099"	5,000	Not Rated	-30	220	Black	5	93781A035	00000
		3/4"	0.765"	1.375"	0.104" to 0.114"	5,000	Not Rated	-30	220	Black	1	93781A039	0000
		1"	1.020"	1.750"	0.115" to 0.125"	5,000	Not Rated	-30	220	Black	1	93781A051	00000

Sanitary Bonded Sealing Washers

Eliminate nooks and crannies under the nut or screw head where dirt and bacteria could collect. Unlike other bonded washers, the metal ring nests inside the rubber layer, creating a smooth outer surface that's easy to clean. These washers stand up to harsh cleaners and detergents and won't corrode from frequent washdowns. They're commonly found on equipment in food and pharmaceutical processing plants to prevent leaks and block out contaminants. Reuse them a handful of times, as long as the material isn't damaged.

316 Stainless Steel and EPDM—These washers are highly resistant to tearing, scuffs, and scrapes. They are more economical than Fluoroprene Fluoroelastomer, however, they aren't as heat resistant.

Chemical-Resistant 316 Stainless Steel and Fluoroprene Fluoroelastomer—These washers withstand higher temperatures than EPDM, so you can sterilize them with steam. They also resist more chemicals, such as oil, solvents, and acids.

					Temp. Range, ° F
	For Screw Size	ID, mm	OD, mm	Thk., mm	Min.	Max.	Color	Food Industry Std.		Each
316 Stainless Steel and EPDM



		M4	4.100	9.700	1.000	-40	300	Black	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600, NSF/ANSI 51	90443A110	000000


		M5	5.100	10.700	1.000	-40	300	Black	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600, NSF/ANSI 51	90443A120	00000
		M6	6.100	13.100	1.000	-40	300	Black	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600, NSF/ANSI 51	90443A130	00000
		M8	8.100	16.900	1.000	-40	300	Black	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600, NSF/ANSI 51	90443A140	00000
		M10	10.100	21.200	1.500	-40	300	Black	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600, NSF/ANSI 51	90443A150	00000
		M12	12.100	25.500	1.500	-40	300	Black	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600, NSF/ANSI 51	90443A160	00000
		M16	16.100	33.900	1.500	-40	300	Black	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600, NSF/ANSI 51	90443A170	00000


		Chemical-Resistant 316 Stainless Steel and Fluoroprene Fluoroelastomer



				M4	4.100	9.700	1.000	5	390	Blue	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	90443A180	00000


				M5	5.100	10.700	1.000	5	390	Blue	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	90443A190	00000
				M6	6.100	13.100	1.000	5	390	Blue	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	90443A210	00000
				M8	8.100	16.900	1.000	5	390	Blue	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	90443A220	00000
				M10	10.100	21.200	1.500	5	390	Blue	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	90443A230	00000
				M12	12.100	25.500	1.500	5	390	Blue	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	90443A240	00000
				M16	16.100	33.900	1.500	5	390	Blue	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	90443A250	00000