3MM CS X 123MM ID BLACK BUNA 70D

Buna-N O-Ring, 3 x 123 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:
H3X123
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Product Specification

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This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 123 mm (4.843 in), a cross section of 3 mm (0.118 in), and an outside diameter of 129 mm (5.08 in), catalogued under part number H3X123. It delivers dependable bidirectional sealing in a compact groove envelope.

Buna-N (Nitrile) is specified here for low compression set under sustained load and economical choice for high-volume maintenance programs. The material holds up against greases and lubricants, water, and hydraulic fluids. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in strong acids or polar solvents.

You will find this material specified across automotive, general industrial maintenance, and construction equipment.

H3X123 ships individually. Unit weight is approximately 3.5 g. Check the compound against your process media, pressure and temperature before committing to a design.
Item
H3X123
Description
3MM CS X 123MM ID BLACK BUNA 70D
Actual Outside Diameter
129 mm (5.08 inch)
Actual Cross Section
3 mm (0.118 inch)
Actual Inside Diameter
123 mm (4.843 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity