-125 BLACK BUNA 70D O-RING

The H70MD125 is an AS568-125 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 1.299 in (32.99 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.505 in (38.23 mm). This o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

The material holds up against hydraulic fluids, many alcohols, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is known for strong abrasion and tear resistance, the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or polar solvents are present.

This item is metal detectable for HACCP and foreign-body control programs. Common environments for this compound include fluid power, hydraulic and pneumatic systems, and construction equipment.

Reference part number H70MD125 when ordering; the item is sold individually. Nominal inside diameter is listed as 1 5/16 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.