4.5MM CS X 30MM ID BLACK BUNA 70D

Buna-N O-Ring, 4.5 x 30 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:
H4.5X30
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Product Specification

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The H4.5X30 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 30 mm (1.181 in), a cross section of 4.5 mm (0.177 in), and an outside diameter of 39 mm (1.54 in). This o-ring delivers dependable bidirectional sealing in a compact groove envelope.

As a material, Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, strong abrasion and tear resistance. The compound resists water, greases and lubricants, and propane and butane. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It should not be specified for service in ketones or automotive brake fluid.

Typical settings include agricultural equipment, general industrial maintenance, and automotive.

H4.5X30 ships individually. As always, verify media compatibility and operating conditions against the requirements of your specific application.
Item
H4.5X30
Description
4.5MM CS X 30MM ID BLACK BUNA 70D
Actual Outside Diameter
39 mm (1.54 inch)
Actual Cross Section
4.5 mm (0.177 inch)
Actual Inside Diameter
30 mm (1.181 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity