3MM CS X 203MM ID BLACK BUNA 70D

Buna-N O-Ring, 3 x 203 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:
H3X203
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Product Specification

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Ordered as H3X203, this is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 203 mm (7.992 in), a cross section of 3 mm (0.118 in), and an outside diameter of 209 mm (8.23 in). The o-ring compresses into its gland to block fluid or gas migration across a joint.

As a material, Buna-N (Nitrile) is valued for the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. Expect good resistance to petroleum-based oils, greases and lubricants, and hydraulic fluids. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).

Common environments for this compound include agricultural equipment, general industrial maintenance, and construction equipment.

Reference part number H3X203 when ordering; the item is sold individually. Unit weight is approximately 5.5868 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.
Item
H3X203
Description
3MM CS X 203MM ID BLACK BUNA 70D
Actual Outside Diameter
209 mm (8.23 inch)
Actual Cross Section
3 mm (0.118 inch)
Actual Inside Diameter
203 mm (7.992 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity