-138 WHITE BUNA 70D FDA O-RING

Ordered as H70FDA138, this is an AS568-138 white Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 2.112 in (53.64 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.318 in (58.88 mm). The o-ring compresses into its gland to block fluid or gas migration across a joint.

This material stands up to water, greases and lubricants, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for low compression set under sustained load and an economical choice for high-volume maintenance programs. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with strong acids or automotive brake fluid.

This item meets FDA requirements for food contact under 21 CFR 177.2600. You will find this material specified across construction equipment, fluid power, and automotive.

Order part number H70FDA138, sold individually. Unit weight is approximately 1.24 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.