7MM CS X 258MM ID BLACK BUNA 70D

Buna-N O-Ring, 7 x 258 mm, 70A, Black, -40 to 250°F

Status
Available
Est. Ship Date
25 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:
H7X258
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Product Specification

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Ordered as H7X258, this is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 258 mm (10.157 in), a cross section of 7 mm (0.276 in), and an outside diameter of 272 mm (10.71 in). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

As a material, Buna-N (Nitrile) is specified for strong abrasion and tear resistance, reliable performance in both static and dynamic service. Expect good resistance to water, greases and lubricants, and many alcohols. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).

It sees regular use in fluid power, automotive, and general industrial maintenance.

Stocked as H7X258 and sold individually. Unit weight is approximately 38.971 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.
Item
H7X258
Description
7MM CS X 258MM ID BLACK BUNA 70D
Actual Outside Diameter
272 mm (10.71 inch)
Actual Cross Section
7 mm (0.276 inch)
Actual Inside Diameter
258 mm (10.157 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity