Seals for 5/16" Shafts | McMaster-Carr

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	Material Material

	System of Measurement System of Measurement

	Color Color

	Black

	For Use With For Use With

	Maximum Temperature Maximum Temperature

Less than 250° F

	For Shaft Diameter For Shaft Diameter	Show

	For Shaft Diameter For Shaft Diameter	Hide

0.210" to 0.260"

0.217" to 0.256"

0.370" to 0.450"

0.374" to 0.453"

0.450" to 0.530"

0.453" to 0.492"

0.498" to 0.502"

0.610" to 0.689"

0.610" to 0.690"

0.623" to 0.627"

0.690" to 0.770"

0.748" to 0.752"

0.748" to 0.827"

0.827" to 0.945"

0.873" to 0.877"

0.945" to 1.063"

0.950" to 1.070"

0.998" to 1.002"

1.063" to 1.142"

1.123" to 1.127"

1.220" to 1.299"

1.220" to 1.300"

1.247" to 1.253"

1.299" to 1.417"

1.375" to 1.381"

1.496" to 1.693"

1.497" to 1.503"

1.500" to 1.700"

1.622" to 1.628"

1.693" to 1.890"

1.700" to 1.890"

1.747" to 1.753"

1.872" to 1.878"

1.890" to 2.087"

1.890" to 2.090"

1.997" to 2.003"

2.087" to 2.283"

2.090" to 2.290"

2.123" to 2.128"

2.249" to 2.255"

2.283" to 2.48"

2.374" to 2.380"

2.480" to 2.677"

2.480" to 2.680"

2.500" to 2.506"

2.625" to 2.631"

2.677" to 2.874"

2.680" to 2.880"

2.750" to 2.756"

2.873" to 2.879"

2.874" to 3.071"

2.880" to 3.070"

3.000" to 3.006"

3.070" to 3.270"

3.071" to 3.268"

3.465" to 3.661"

3.470" to 3.660"

3.661" to 3.858"

3.858" to 4.134"

3.860" to 4.140"

11.500 to 12.500mm

13.500 to 15.500mm

15.500 to 17.500mm

19.000 to 21.000mm

24.000 to 27.000mm

29.000 to 31.000mm

33.000 to 36.000mm

38.000 to 43.000mm

48.000 to 53.000mm

	For Motion Type For Motion Type

	Rotary

	Seal ID Seal ID

	For Bore Diameter For Bore Diameter

	Seal Width Seal Width

	Seal OD Seal OD

	For Sealing For Sealing

	Maximum Pressure Maximum Pressure

	Loader Type Loader Type

	Spring

	For Minimum Bore Width For Minimum Bore Width

	Maximum Speed Maximum Speed

	Case Material Case Material

	Case Color Case Color

	Green

	Specifications Met Specifications Met

DIN

ISO

	Reinforcement Type Reinforcement Type

	Minimum Temperature Minimum Temperature

	Hardness Rating Hardness Rating

	Spring Material Spring Material

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2 Products

Spring-Loaded Rotary Shaft Seals with Wiper Lip

Side 1

Side 2

Profile

Used to retain oil on rotating shafts in motors, pumps, bearings, and gearboxes, these seals have a secondary lip that blocks contaminants. Also known as oil seals, a spring secures the lip against the shaft, preventing messy leaks. Press-fit seals into the bore around the shaft. Seals with a maximum pressure of 50 psi should be secured with a retaining ring.

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

For technical drawings and 3-D models, click on a part number.

Inch

	For Bore
For Shaft Dia.	Dia.	Min. Wd.	Max. Speed, rpm	Max. Pressure, psi	Temp. Range, °F	Hardness	Color	Specifications Met		Each
Buna-N Rubber with Steel Case and Spring
5/16"	0.750"	0.272"	24,000	50	-40° to 210°	Durometer 75A (Hard)	Black	DIN 3760, ISO 6194	0000000	00000

Rotary Shaft Seals for Grease

Side 1

Side 2

Profile

Also known as grease seals, these are designed to retain thick lubricant at low pressure in motors, pumps, bearings, and gearboxes. They have a light grip on the shaft that creates less friction than spring-loaded seals. Press-fit seals into the bore around the shaft.

Seals with an acrylic-coated case have a coating that compensates for surface imperfections in the housing bore for a tight seal on the OD.

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

For technical drawings and 3-D models, click on a part number.

Inch

	For Bore							Case
For Shaft Dia.	Dia.	Min. Wd.	Max. Speed, rpm	Max. Pressure, psi	Temp. Range, °F	Hardness	Color	Finish	Color	Specifications Met		Each
Buna-N Rubber with Steel Case
5/16"	0.626"	0.172"	24,000	10	-40° to 210°	Durometer 75A (Hard)	Black	Acrylic Coated	Green	DIN 3760, ISO 6194	0000000	00000

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The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)