Durometer 85A O-Rings | McMaster-Carr

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System of Measurement

Shaft Diameter

Seal ID

Seal OD

Seal Width

Material

Screw Size

For Use With

Diluted Salt Solutions

Thickness

Maximum Pressure

3,000 psi to 9,999 psi

10,000 psi or greater

Washer Type

Maximum Temperature

For Sealing

Hardness Rating

Faceplate Diameter

Performance

Color

Environment

REACH

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

RoHS

28 Products

Shaft-Mounted Rotary Shaft Seals


Side 1	Side 2	Profile

Also known as V-rings and flingers, these seals protect shaft bearings by blocking dust and other contaminants while retaining lubricant. They’re Buna-N for excellent resistance to oil and grease. To install, stretch the seal over your shaft and press it firmly against the faceplate. The Seal OD and Seal Width listed are the dimensions of the seal after it is installed.

Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.

	For Shaft			Seal
	Dia.	Dia. Range	For Faceplate Dia.	ID	OD	Wd.	Max. Rotation Speed, rpm	Max. Pressure, psi	Temp. Range, ° F	Hardness	Color		Each
Buna-N



		1/4"	0.210" to 0.260"	0.500" to 0.550"	0.193"	0.547"	0.190"	29,000	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	00000


		3/8"	0.370" to 0.450"	0.890" to 0.970"	0.340"	0.891"	0.250"	17,400	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000
		1/2"	0.450" to 0.530"	0.970" to 1.050"	0.414"	1.016"	0.250"	14,500	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000
		5/8"	0.610" to 0.690"	1.210" to 1.290"	0.561"	1.234"	0.375"	10,900	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000
		3/4"	0.690" to 0.770"	1.290" to 1.370"	0.635"	1.359"	0.375"	9,600	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000
		1"	0.950" to 1.070"	1.550" to 1.670"	0.874"	1.609"	0.375"	6,900	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000
		1 1/8"	1.070" to 1.140"	1.670" to 1.740"	0.984"	1.725"	0.375"	6,200	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000
		1 1/4"	1.220" to 1.300"	1.820" to 1.900"	1.122"	1.859"	0.375"	5,400	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000
		1 3/8"	1.300" to 1.420"	1.900" to 2.020"	1.196"	1.975"	0.375"	4,900	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000
		1 1/2"	1.500" to 1.700"	2.100" to 2.300"	1.380"	2.109"	0.375"	4,300	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000
		1 3/4"	1.700" to 1.890"	2.300" to 2.490"	1.564"	2.359"	0.375"	3,800	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000


		2"	1.890" to 2.090"	2.490" to 2.690"	1.739"	2.609"	0.375"	3,400	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000
		2 1/4"	2.090" to 2.290"	2.690" to 2.890"	1.923"	2.859"	0.375"	3,100	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000
		2 3/8"	2.290" to 2.480"	2.890" to 3.080"	2.107"	2.975"	0.500"	2,900	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000
		2 1/2"	2.480" to 2.680"	3.080" to 3.280"	2.282"	3.109"	0.500"	2,600	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000
		2 3/4"	2.680" to 2.880"	3.280" to 3.480"	2.466"	3.359"	0.500"	2,400	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	00000
		3"	2.880" to 3.070"	3.480" to 3.670"	2.650"	3.609"	0.500"	2,300	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000
		3 1/4"	3.070" to 3.270"	3.670" to 3.870"	2.824"	3.859"	0.500"	2,100	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	0000
		3 1/2"	3.470" to 3.660"	4.070" to 4.260"	3.192"	4.109"	0.500"	1,900	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	00000
		3 3/4"	3.660" to 3.860"	4.260" to 4.460"	3.367"	4.350"	0.500"	1,800	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	00000
		4"	3.860" to 4.140"	4.460" to 4.740"	3.551"	4.609"	0.500"	1,700	100	-20 to 225	Durometer 85A (Hard)	Black	0000000	00000

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.

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



		M5	4.8	9.8	0.9 to 1.2	15,200	200	-30	220	Black	5	000000000	000000


		M6	5.8	11.3	1.1 to 1.4	12,800	200	-30	220	Black	5	000000000	00000
		M8	7.8	13.5	1.1 to 1.4	7,900	200	-30	220	Black	5	000000000	00000
		M10	9.7	15.3	1.1 to 1.4	7,200	200	-30	220	Black	5	000000000	00000
		M12	11.7	19.3	1.1 to 1.4	7,100	200	-30	220	Black	5	000000000	00000
		M14	13.7	22.4	1.1 to 1.4	8,000	200	-30	220	Black	5	000000000	00000
		M16	15.7	27.1	1.1 to 1.4	12,500	200	-30	220	Black	5	000000000	00000