H70201 is an AS568-201 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 0.171 in (4.34 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.449 in (11.4 mm). In service, this o-ring compresses into its gland to block fluid or gas migration across a joint.
As a material, Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, strong abrasion and tear resistance. It resists propane and butane, water, and petroleum-based oils. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).
Maintenance and OEM teams specify it across fluid power, agricultural equipment, and general industrial maintenance.
Order part number H70201, sold individually. Unit weight is approximately 0.2955 g and nominal inside diameter is listed as 3/16 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. 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.
Description -201 BLACK BUNA 70D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 0.171 inch (4.34 mm)
Actual Outside Diameter 0.449 inch (11.4 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity