You have no items in your shopping cart.

-356 BLACK BUNA 50D O-RING

Buna-N O-Ring, 5.35 in ID x 0.21 CS, 50A, Black, -40 to 250°F

Status
Out of Stock
Est. Ship Date
21 Oct 2026
Material
Buna-N (Nitrile / NBR)
Dash Size
356
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
3/16 inch
Nominal Inside Diameter
5 3/8 inch
Nominal Outside Diameter
5 3/4 inch
Unit of Measure
EA
SKU:
H50356

Product Specification

-
H50356 is an AS568-356 black Buna-N (Nitrile) 50 Shore A O-Ring supplied with an inside diameter of 5.35 in (135.89 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.77 in (146.56 mm). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.

As a material, Buna-N (Nitrile) is valued for strong abrasion and tear resistance, the most widely specified general-purpose sealing elastomer. Expect good resistance to petroleum-based oils, hydraulic fluids, and many alcohols. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ketones or strong acids.

You will find this material specified across agricultural equipment, construction equipment, and automotive.

Stocked as H50356 and sold individually. Check the compound against your process media, pressure and temperature before committing to a design.
Item
H50356
Description
-356 BLACK BUNA 50D O-RING
Actual Cross Section
0.21 inch (5.33 mm)
Actual Inside Diameter
5.35 inch (135.89 mm)
Actual Outside Diameter
5.77 inch (146.56 mm)
FDA Compliant
No
Measurement System
Imperial
Metal Detectable
No
NSF Certified
No
Product Code
6005
Product Category
O-Rings - Bulk - Commodity