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-381 BLACK BUNA 50D O-RING

Buna-N O-Ring, 11.975 in ID x 0.21 CS, 50A, Black, -40 to 250°F

Status
Out of Stock
Est. Ship Date
22 Oct 2026
Material
Buna-N (Nitrile / NBR)
Dash Size
381
Durometer
50 Shore A
Cross Section Type
Round
Color
Black
Minimum Temperature
-40°F (-40°C)
Maximum Temperature
250°F (121°C)
Nominal Cross Section
3/16 inch
Nominal Inside Diameter
12 inch
Nominal Outside Diameter
12 3/8 inch
Unit of Measure
EA
SKU:
H50381

Product Specification

-
This o-ring is supplied in AS568-381 black Buna-N (Nitrile) 50 Shore A supplied with an inside diameter of 11.975 in (304.17 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 12.395 in (314.83 mm), catalogued under part number H50381. It creates a positive seal at flange, piston and rod interfaces without added hardware.

As a material, Buna-N (Nitrile) offers strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. This material stands up to greases and lubricants, petroleum-based oils, and water. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Verify compatibility before use with ozone and direct sunlight or automotive brake fluid.

Typical settings include fluid power, general industrial maintenance, and agricultural equipment.

H50381 ships individually. Nominal inside diameter is listed as 12 inch. Check the compound against your process media, pressure and temperature before committing to a design.
Item
H50381
Description
-381 BLACK BUNA 50D O-RING
Actual Cross Section
0.21 inch (5.33 mm)
Actual Inside Diameter
11.975 inch (304.17 mm)
Actual Outside Diameter
12.395 inch (314.83 mm)
FDA Compliant
No
Measurement System
Imperial
Metal Detectable
No
NSF Certified
No
Product Code
6005
Product Category
O-Rings - Bulk - Commodity