-241 BLACK BUNA 90D O-RING

Buna-N O-Ring, 3.859 in ID x 0.139 CS, 90A, Black, -40 to 250°F

Status
Available
Est. Ship Date
31 Oct 2026
Material
Buna-N (Nitrile / NBR)
Dash Size
241
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
3 7/8 inch
Nominal Outside Diameter
4 1/8 inch
Unit of Measure
EA
SKU:
H90241
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Product Specification

-
The H90241 is an AS568-241 black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 3.859 in (98.02 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.137 in (105.08 mm). This o-ring remains the most cost-effective sealing element available for pressurized assemblies.

Expect good resistance to hydraulic fluids, petroleum-based oils, and water. Buna-N (Nitrile) offers the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Applications involving ketones or strong acids call for a different compound.

Maintenance and OEM teams specify it across general industrial maintenance, agricultural equipment, and hydraulic and pneumatic systems.

This item is sold individually under part number H90241. Unit weight is approximately 4.07 g and nominal inside diameter is listed as 3 7/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.
Item
H90241
Description
-241 BLACK BUNA 90D O-RING
Actual Cross Section
0.139 inch (3.53 mm)
Actual Inside Diameter
3.859 inch (98.02 mm)
Actual Outside Diameter
4.137 inch (105.08 mm)
FDA Compliant
No
Measurement System
Imperial
Metal Detectable
No
NSF Certified
No
Product Code
6005
Product Category
O-Rings - Bulk - Commodity