-241 BLACK BUNA 50D O-RING

Buna-N O-Ring, 3.859 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
241
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
3 7/8 inch
Nominal Outside Diameter
4 1/8 inch
Unit of Measure
EA
SKU:
H50241
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Product Specification

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APG stocks the H50241, an AS568-241 black Buna-N (Nitrile) 50 Shore A O-Ring supplied with 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). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

As a material, Buna-N (Nitrile) delivers an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. The material holds up against greases and lubricants, petroleum-based oils, and propane and butane. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

You will find this material specified across fluid power, construction equipment, and hydraulic and pneumatic systems.

Stocked as H50241 and sold individually. Unit weight is approximately 0.004 g and nominal inside diameter is listed as 3 7/8 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Item
H50241
Description
-241 BLACK BUNA 50D 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