3MM CS X 57MM ID BLACK BUNA 70D

Buna-N O-Ring, 3 x 57 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:
H3X57
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Product Specification

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The H3X57 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 57 mm (2.244 in), a cross section of 3 mm (0.118 in), and an outside diameter of 63 mm (2.48 in). This o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

As a material, Buna-N (Nitrile) is valued for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. It resists many alcohols, hydraulic fluids, and petroleum-based oils. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Verify compatibility before use with polar solvents or ozone and direct sunlight.

It sees regular use in agricultural equipment, construction equipment, and fluid power.

Stocked as H3X57 and sold individually. Unit weight is approximately 1.633 g. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Item
H3X57
Description
3MM CS X 57MM ID BLACK BUNA 70D
Actual Outside Diameter
63 mm (2.48 inch)
Actual Cross Section
3 mm (0.118 inch)
Actual Inside Diameter
57 mm (2.244 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity