APG stocks the H50355, an AS568-355 black Buna-N (Nitrile) 50 Shore A O-Ring built to an inside diameter of 5.225 in (132.72 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.645 in (143.38 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.
Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, economical choice for high-volume maintenance programs. The material holds up against propane and butane, greases and lubricants, and petroleum-based oils. 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 strong acids or ketones.
Common environments for this compound include general industrial maintenance, construction equipment, and hydraulic and pneumatic systems.
Order part number H50355, sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation.
Description -355 BLACK BUNA 50D O-RING
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 5.225 inch (132.72 mm)
Actual Outside Diameter 5.645 inch (143.38 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity