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-315 BLACK BUNA 50D O-RING

Buna-N O-Ring, 0.787 in ID x 0.21 CS, 50A, Black, -40 to 250°F

Status
Out of Stock
Est. Ship Date
20 Oct 2026
Material
Buna-N (Nitrile / NBR)
Dash Size
315
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
13/16 inch
Nominal Outside Diameter
1 3/16 inch
Unit of Measure
EA
SKU:
H50315

Product Specification

-
The H50315 is an AS568-315 black Buna-N (Nitrile) 50 Shore A O-Ring with an inside diameter of 0.787 in (19.99 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.207 in (30.66 mm). This o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

This material stands up to many alcohols, water, and hydraulic fluids. Buna-N (Nitrile) is valued for strong abrasion and tear resistance, the most widely specified general-purpose sealing elastomer. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where strong acids or ozone and direct sunlight are present.

Typical settings include fluid power, construction equipment, and agricultural equipment.

This item is sold individually under part number H50315. As always, verify media compatibility and operating conditions against the requirements of your specific application. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.
Item
H50315
Description
-315 BLACK BUNA 50D O-RING
Actual Cross Section
0.21 inch (5.33 mm)
Actual Inside Diameter
0.787 inch (19.99 mm)
Actual Outside Diameter
1.207 inch (30.66 mm)
FDA Compliant
No
Measurement System
Imperial
Metal Detectable
No
NSF Certified
No
Product Code
6005
Product Category
O-Rings - Bulk - Commodity