You have no items in your shopping cart.

-270 BLACK BUNA 50D O-RING

Buna-N O-Ring, 8.984 in ID x 0.139 CS, 50A, Black, -40 to 250°F

Status
Out of Stock
Est. Ship Date
21 Oct 2026
Material
Buna-N (Nitrile / NBR)
Dash Size
270
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
9 inch
Nominal Outside Diameter
9 1/4 inch
Unit of Measure
EA
SKU:
H50270

Product Specification

-
Ordered as H50270, this is an AS568-270 black Buna-N (Nitrile) 50 Shore A O-Ring supplied with an inside diameter of 8.984 in (228.19 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 9.262 in (235.25 mm). The o-ring compresses into its gland to block fluid or gas migration across a joint.

As a material, Buna-N (Nitrile) is widely chosen for an economical choice for high-volume maintenance programs and low compression set under sustained load. The compound resists many alcohols, petroleum-based oils, and greases and lubricants. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).

Common environments for this compound include general industrial maintenance, construction equipment, and hydraulic and pneumatic systems.

Stocked as H50270 and sold individually. Nominal inside diameter is listed as 9 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
Item
H50270
Description
-270 BLACK BUNA 50D O-RING
Actual Cross Section
0.139 inch (3.53 mm)
Actual Inside Diameter
8.984 inch (228.19 mm)
Actual Outside Diameter
9.262 inch (235.25 mm)
FDA Compliant
No
Measurement System
Imperial
Metal Detectable
No
NSF Certified
No
Product Code
6005
Product Category
O-Rings - Bulk - Commodity