4MM CS X 177MM ID BLACK BUNA 70D

Buna-N O-Ring, 4 x 177 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:
H4X177
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Product Specification

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Part number H4X177 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 177 mm (6.969 in), a cross section of 4 mm (0.157 in), and an outside diameter of 185 mm (7.28 in). An o-ring delivers dependable bidirectional sealing in a compact groove envelope.

It resists petroleum-based oils, propane and butane, and water. Buna-N (Nitrile) is valued for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

Typical settings include hydraulic and pneumatic systems, automotive, and construction equipment.

H4X177 ships individually. Unit weight is approximately 8.727 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
H4X177
Description
4MM CS X 177MM ID BLACK BUNA 70D
Actual Outside Diameter
185 mm (7.28 inch)
Actual Cross Section
4 mm (0.157 inch)
Actual Inside Diameter
177 mm (6.969 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity