4MM CS X 85MM ID BLACK BUNA 70D

Buna-N O-Ring, 4 x 85 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:
H4X85
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Product Specification

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This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 85 mm (3.346 in), a cross section of 4 mm (0.157 in), and an outside diameter of 93 mm (3.66 in), catalogued under part number H4X85. It delivers dependable bidirectional sealing in a compact groove envelope.

Buna-N (Nitrile) is known for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. The compound resists hydraulic fluids, many alcohols, and water. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Verify compatibility before use with strong acids or ketones.

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

Stocked as H4X85 and sold individually. Unit weight is approximately 4.29 g. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Item
H4X85
Description
4MM CS X 85MM ID BLACK BUNA 70D
Actual Outside Diameter
93 mm (3.66 inch)
Actual Cross Section
4 mm (0.157 inch)
Actual Inside Diameter
85 mm (3.346 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity