3.5MM CS X 25MM ID BLACK BUNA 70D

Buna-N O-Ring, 3.5 x 25 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:
H3.5X25
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Product Specification

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This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A with an inside diameter of 25 mm (0.984 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 32 mm (1.26 in), catalogued under part number H3.5X25. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Expect good resistance to water, many alcohols, and greases and lubricants. Buna-N (Nitrile) delivers strong abrasion and tear resistance, low compression set under sustained load. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ketones or ozone and direct sunlight.

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

Reference part number H3.5X25 when ordering; the item is sold individually. Unit weight is approximately 1.052 g. Check the compound against your process media, pressure and temperature before committing to a design. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
Item
H3.5X25
Description
3.5MM CS X 25MM ID BLACK BUNA 70D
Actual Outside Diameter
32 mm (1.26 inch)
Actual Cross Section
3.5 mm (0.138 inch)
Actual Inside Diameter
25 mm (0.984 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity