Buna 70-358-Black-Pk5

Ordered as SB-H70358-5, this is an AS568-358 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 5.6 in (142.24 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 6.02 in (152.91 mm). The o-ring creates a positive seal at flange, piston and rod interfaces without added hardware. The catalog record notes: 0.210CSX5.600"IDX6.020"OD.

As a material, Buna-N (Nitrile) is specified for low compression set under sustained load, strong abrasion and tear resistance. The compound resists hydraulic fluids, many alcohols, and greases and lubricants. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to ketones or strong acids will shorten service life.

Common environments for this compound include hydraulic and pneumatic systems, construction equipment, and automotive.

Reference part number SB-H70358-5 when ordering; the item is sold by the bag. Nominal inside diameter is listed as 5 5/8 inch. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.