3.5MM CS X 170MM ID BLACK BUNA 70D

Buna-N O-Ring, 3.5 x 170 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:
H3.5X170
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Product Specification

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Ordered as H3.5X170, this is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 170 mm (6.693 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 177 mm (6.97 in). The o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Expect good resistance to water, propane and butane, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service.

Common environments for this compound include fluid power, agricultural equipment, and construction equipment.

This item is sold individually under part number H3.5X170. Unit weight is approximately 6.4064 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
H3.5X170
Description
3.5MM CS X 170MM ID BLACK BUNA 70D
Actual Outside Diameter
177 mm (6.97 inch)
Actual Cross Section
3.5 mm (0.138 inch)
Actual Inside Diameter
170 mm (6.693 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity