3.5MM CS X 45.7MM ID BLACK BUNA 70D

Buna-N O-Ring, 3.5 x 45.7 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:
H3.5X45.7
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Product Specification

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This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 45.7 mm (1.799 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 52.7 mm (2.07 in), catalogued under part number H3.5X45.7. It creates a positive seal at flange, piston and rod interfaces without added hardware. The catalog record notes: Metric O-RING, JIS P46.

Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, most widely specified general-purpose sealing elastomer. Expect good resistance to greases and lubricants, petroleum-based oils, and many alcohols. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to ozone and direct sunlight or strong acids will shorten service life.

It sees regular use in hydraulic and pneumatic systems, automotive, and fluid power.

Reference part number H3.5X45.7 when ordering; the item is sold individually. Unit weight is approximately 1.8215 g. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
Item
H3.5X45.7
Description
3.5MM CS X 45.7MM ID BLACK BUNA 70D
Actual Outside Diameter
52.7 mm (2.07 inch)
Actual Cross Section
3.5 mm (0.138 inch)
Actual Inside Diameter
45.7 mm (1.799 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity