3.53MM CS X 6.97MM ID BLACK BUNA 70D

Buna-N O-Ring, 3.53 x 6.97 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:
H3.53X6.97
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Product Specification

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This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 6.97 mm (0.274 in), a cross section of 3.53 mm (0.139 in), and an outside diameter of 14.03 mm (0.55 in), catalogued under part number H3.53X6.97. It creates a positive seal at flange, piston and rod interfaces without added hardware.

Buna-N (Nitrile) is valued for reliable performance in both static and dynamic service, low compression set under sustained load. This material stands up to greases and lubricants, water, and hydraulic fluids. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with polar solvents or automotive brake fluid.

Common environments for this compound include hydraulic and pneumatic systems, fluid power, and agricultural equipment.

Reference part number H3.53X6.97 when ordering; the item is sold individually. 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
H3.53X6.97
Description
3.53MM CS X 6.97MM ID BLACK BUNA 70D
Actual Outside Diameter
14.03 mm (0.55 inch)
Actual Cross Section
3.53 mm (0.139 inch)
Actual Inside Diameter
6.97 mm (0.274 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity