2MM CS X 31MM ID BLACK BUNA 70D

Buna-N O-Ring, 2 x 31 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:
H2X31
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Product Specification

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The H2X31 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 31 mm (1.22 in), a cross section of 2 mm (0.079 in), and an outside diameter of 35 mm (1.38 in). This o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load. Additional detail on this item: Metric O-RING, JIS S31.5.

The compound resists hydraulic fluids, greases and lubricants, and petroleum-based oils. Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with polar solvents or automotive brake fluid.

Common environments for this compound include automotive, agricultural equipment, and general industrial maintenance.

Order part number H2X31, sold individually. Unit weight is approximately 0.397 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
H2X31
Description
2MM CS X 31MM ID BLACK BUNA 70D
Actual Outside Diameter
35 mm (1.38 inch)
Actual Cross Section
2 mm (0.079 inch)
Actual Inside Diameter
31 mm (1.22 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity