-231 BLACK BUNA 50D O-RING

Buna-N O-Ring, 2.609 in ID x 0.139 CS, 50A, Black, -40 to 250°F

Status
Available
Est. Ship Date
31 Oct 2026
Material
Buna-N (Nitrile / NBR)
Dash Size
231
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
1/8 inch
Nominal Inside Diameter
2 5/8 inch
Nominal Outside Diameter
2 7/8 inch
Unit of Measure
EA
SKU:
H50231
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Product Specification

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Part number H50231 is an AS568-231 black Buna-N (Nitrile) 50 Shore A O-Ring built to an inside diameter of 2.609 in (66.27 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 2.887 in (73.33 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

As a material, Buna-N (Nitrile) is specified for the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. The compound resists water, hydraulic fluids, and greases and lubricants. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).

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

Reference part number H50231 when ordering; the item is sold individually. Nominal inside diameter is listed as 2 5/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.
Item
H50231
Description
-231 BLACK BUNA 50D O-RING
Actual Cross Section
0.139 inch (3.53 mm)
Actual Inside Diameter
2.609 inch (66.27 mm)
Actual Outside Diameter
2.887 inch (73.33 mm)
FDA Compliant
No
Measurement System
Imperial
Metal Detectable
No
NSF Certified
No
Product Code
6005
Product Category
O-Rings - Bulk - Commodity