2.5MM CS X 17.5MM ID BLACK BUNA 70D

Buna-N O-Ring, 2.5 x 17.5 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:
H2.5X17.5
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Product Specification

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H2.5X17.5 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 17.5 mm (0.689 in), a cross section of 2.5 mm (0.098 in), and an outside diameter of 22.5 mm (0.89 in). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

Expect good resistance to hydraulic fluids, greases and lubricants, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is valued 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).

Common environments for this compound include automotive, construction equipment, and fluid power.

This item is sold individually under part number H2.5X17.5. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.
Item
H2.5X17.5
Description
2.5MM CS X 17.5MM ID BLACK BUNA 70D
Actual Outside Diameter
22.5 mm (0.89 inch)
Actual Cross Section
2.5 mm (0.098 inch)
Actual Inside Diameter
17.5 mm (0.689 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity