-338 BLACK BUNA 90D O-RING

Buna-N O-Ring, 3.1 in ID x 0.21 CS, 90A, Black, -40 to 250°F

Status
Available
Est. Ship Date
31 Oct 2026
Material
Buna-N (Nitrile / NBR)
Dash Size
338
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
3/16 inch
Nominal Inside Diameter
3 1/8 inch
Nominal Outside Diameter
3 1/2 inch
Unit of Measure
EA
SKU:
H90338
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Product Specification

-
Ordered as H90338, this is an AS568-338 black Buna-N (Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 3.1 in (78.74 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.52 in (89.41 mm). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs and low compression set under sustained load. The material holds up against propane and butane, hydraulic fluids, and water. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

Typical settings include fluid power, hydraulic and pneumatic systems, and general industrial maintenance.

This item is sold individually under part number H90338. Unit weight is approximately 7.596 g. Check the compound against your process media, pressure and temperature before committing to a design.
Item
H90338
Description
-338 BLACK BUNA 90D O-RING
Actual Cross Section
0.21 inch (5.33 mm)
Actual Inside Diameter
3.1 inch (78.74 mm)
Actual Outside Diameter
3.52 inch (89.41 mm)
FDA Compliant
No
Measurement System
Imperial
Metal Detectable
No
NSF Certified
No
Product Code
6005
Product Category
O-Rings - Bulk - Commodity