3.5MM CS X 8MM ID BLACK BUNA 70D

Buna-N O-Ring, 3.5 x 8 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:
H3.5X8
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Product Specification

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The H3.5X8 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 8 mm (0.315 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 15 mm (0.59 in). This o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Buna-N (Nitrile) is valued for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Expect good resistance to petroleum-based oils, hydraulic fluids, and many alcohols. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

Typical settings include general industrial maintenance, hydraulic and pneumatic systems, and agricultural equipment.

Order part number H3.5X8, sold individually. Unit weight is approximately 0.43 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
H3.5X8
Description
3.5MM CS X 8MM ID BLACK BUNA 70D
Actual Outside Diameter
15 mm (0.59 inch)
Actual Cross Section
3.5 mm (0.138 inch)
Actual Inside Diameter
8 mm (0.315 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity