3MM CS X 7.5MM ID BLACK BUNA 70D

Buna-N O-Ring, 3 x 7.5 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:
H3X7.5
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Product Specification

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Ordered as H3X7.5, this is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 7.5 mm (0.295 in), a cross section of 3 mm (0.118 in), and an outside diameter of 13.5 mm (0.53 in). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

The material holds up against petroleum-based oils, water, and hydraulic fluids. Buna-N (Nitrile) is specified for strong abrasion and tear resistance, the most widely specified general-purpose sealing elastomer. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with automotive brake fluid or ozone and direct sunlight.

It sees regular use in agricultural equipment, hydraulic and pneumatic systems, and fluid power.

Stocked as H3X7.5 and sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
Item
H3X7.5
Description
3MM CS X 7.5MM ID BLACK BUNA 70D
Actual Outside Diameter
13.5 mm (0.53 inch)
Actual Cross Section
3 mm (0.118 inch)
Actual Inside Diameter
7.5 mm (0.295 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity