2.5MM CS X 57MM ID BLACK BUNA 70D

Buna-N O-Ring, 2.5 x 57 mm, 70A, Black, -40 to 250°F

Status
Available
Est. Ship Date
1 Nov 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:
H2.5X57
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Product Specification

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The H2.5X57 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 57 mm (2.244 in), a cross section of 2.5 mm (0.098 in), and an outside diameter of 62 mm (2.44 in). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. The compound resists water, greases and lubricants, and petroleum-based oils. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service.

You will find this material specified across construction equipment, agricultural equipment, and automotive.

Order part number H2.5X57, sold individually. Unit weight is approximately 1.1066 g. 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
H2.5X57
Description
2.5MM CS X 57MM ID BLACK BUNA 70D
Actual Outside Diameter
62 mm (2.44 inch)
Actual Cross Section
2.5 mm (0.098 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