3.5MM CS X 40MM ID BLACK BUNA 70D

Buna-N O-Ring, 3.5 x 40 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:
H3.5X40
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Product Specification

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Part number H3.5X40 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 40 mm (1.575 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 47 mm (1.85 in). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Buna-N (Nitrile) delivers the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. It resists many alcohols, hydraulic fluids, and greases and lubricants. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where automotive brake fluid or ozone and direct sunlight are present.

Typical settings include agricultural equipment, hydraulic and pneumatic systems, and fluid power.

H3.5X40 ships individually. Unit weight is approximately 1.606 g. Check the compound against your process media, pressure and temperature before committing to a design.
Item
H3.5X40
Description
3.5MM CS X 40MM ID BLACK BUNA 70D
Actual Outside Diameter
47 mm (1.85 inch)
Actual Cross Section
3.5 mm (0.138 inch)
Actual Inside Diameter
40 mm (1.575 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity