7MM CS X 187.3MM ID BLACK BUNA 70D

Buna-N O-Ring, 7 x 187.3 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:
H7X187.3
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Product Specification

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Ordered as H7X187.3, this is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 187.3 mm (7.374 in), a cross section of 7 mm (0.276 in), and an outside diameter of 201.3 mm (7.93 in). The o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

As a material, Buna-N (Nitrile) delivers low compression set under sustained load and the most widely specified general-purpose sealing elastomer. The compound resists petroleum-based oils, greases and lubricants, and hydraulic fluids. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in ozone and direct sunlight or automotive brake fluid.

Typical settings include automotive, construction equipment, and fluid power.

H7X187.3 ships individually. Review your operating media and conditions against this specification before installation.
Item
H7X187.3
Description
7MM CS X 187.3MM ID BLACK BUNA 70D
Actual Outside Diameter
201.3 mm (7.93 inch)
Actual Cross Section
7 mm (0.276 inch)
Actual Inside Diameter
187.3 mm (7.374 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity