4MM CS X 135MM ID BLACK BUNA 70D

Buna-N O-Ring, 4 x 135 mm, 70A, Black, -40 to 250°F

Status
Available
Est. Ship Date
31 Oct 2026
Material
Buna-N (Nitrile / NBR)
Durometer
70 Shore A
Cross Section Type
Round
Color
Black
Minimum Temperature
-40°F (-40°C)
Maximum Temperature
250°F (121°C)
Unit of Measure
EA
SKU:
H4X135
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Product Specification

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H4X135 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 135 mm (5.315 in), a cross section of 4 mm (0.157 in), and an outside diameter of 143 mm (5.63 in). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

This material stands up to petroleum-based oils, greases and lubricants, and hydraulic fluids. Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

Typical settings include general industrial maintenance, fluid power, and automotive.

Order part number H4X135, sold individually. Unit weight is approximately 6.7225 g. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.
Item
H4X135
Description
4MM CS X 135MM ID BLACK BUNA 70D
Actual Outside Diameter
143 mm (5.63 inch)
Actual Cross Section
4 mm (0.157 inch)
Actual Inside Diameter
135 mm (5.315 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity