-342 BLACK BUNA 70D O-RING

Buna-N O-Ring, 3.6 in ID x 0.21 CS, 70A, Black, -40 to 250°F

Status
Available
Est. Ship Date
2 Nov 2026
Material
Buna-N (Nitrile / NBR)
Dash Size
342
Durometer
70 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 5/8 inch
Nominal Outside Diameter
4 inch
Unit of Measure
EA
SKU:
H70342
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Product Specification

-
Ordered as H70342, this is an AS568-342 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 3.6 in (91.44 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.02 in (102.11 mm). The o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

As a material, Buna-N (Nitrile) is specified for low compression set under sustained load, reliable performance in both static and dynamic service. The material holds up against many alcohols, water, and greases and lubricants. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in strong acids or polar solvents.

Common environments for this compound include general industrial maintenance, automotive, and agricultural equipment.

Reference part number H70342 when ordering; the item is sold individually. Unit weight is approximately 8.37 g and nominal inside diameter is listed as 3 5/8 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.
Item
H70342
Description
-342 BLACK BUNA 70D O-RING
Actual Cross Section
0.21 inch (5.33 mm)
Actual Inside Diameter
3.6 inch (91.44 mm)
Actual Outside Diameter
4.02 inch (102.11 mm)
FDA Compliant
No
Measurement System
Imperial
Metal Detectable
No
NSF Certified
No
Product Code
6005
Product Category
O-Rings - Bulk - Commodity