2.5MM CS X 100MM ID BLACK BUNA 70D

Buna-N O-Ring, 2.5 x 100 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:
H2.5X100
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Product Specification

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Part number H2.5X100 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 100 mm (3.937 in), a cross section of 2.5 mm (0.098 in), and an outside diameter of 105 mm (4.13 in). An o-ring compresses into its gland to block fluid or gas migration across a joint.

The compound resists propane and butane, petroleum-based oils, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Exposure to polar solvents or ozone and direct sunlight will shorten service life.

Typical settings include hydraulic and pneumatic systems, automotive, and agricultural equipment.

Reference part number H2.5X100 when ordering; the item is sold individually. Unit weight is approximately 2.065 g. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Item
H2.5X100
Description
2.5MM CS X 100MM ID BLACK BUNA 70D
Actual Outside Diameter
105 mm (4.13 inch)
Actual Cross Section
2.5 mm (0.098 inch)
Actual Inside Diameter
100 mm (3.937 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity