-908 BLACK BUNA 90D O-RING

Buna-N O-Ring, 0.644 in ID x 0.087 CS, 90A, Black, -40 to 250°F

Status
Available
Est. Ship Date
1 Nov 2026
Material
Buna-N (Nitrile / NBR)
Dash Size
908
Durometer
90 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
1/2 inch
Nominal Outside Diameter
3/4 inch
Unit of Measure
EA
SKU:
H90908
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Product Specification

-
Part number H90908 is an AS568-908 black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 0.644 in (16.36 mm), a cross section of 0.087 in (2.21 mm), and an outside diameter of 0.818 in (20.78 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

This material stands up to greases and lubricants, propane and butane, and water. Buna-N (Nitrile) is specified for low compression set under sustained load, strong abrasion and tear resistance. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where automotive brake fluid or strong acids are present.

Common environments for this compound include hydraulic and pneumatic systems, fluid power, and automotive.

This item is sold individually under part number H90908. Unit weight is approximately 0.3146 g. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.
Item
H90908
Description
-908 BLACK BUNA 90D O-RING
Actual Cross Section
0.087 inch (2.21 mm)
Actual Inside Diameter
0.644 inch (16.36 mm)
Actual Outside Diameter
0.818 inch (20.78 )
FDA Compliant
No
Measurement System
Imperial
Metal Detectable
No
NSF Certified
No
Product Code
6005
Product Category
O-Rings - Bulk - Commodity