H70MD316 is an AS568-316 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 0.85 in (21.59 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.27 in (32.26 mm). In service, this o-ring compresses into its gland to block fluid or gas migration across a joint.
It resists many alcohols, water, and petroleum-based oils. Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It is not the right choice where automotive brake fluid or strong acids are present.
The compound is metal detectable for HACCP and foreign-body control programs. Maintenance and OEM teams specify it across agricultural equipment, construction equipment, and general industrial maintenance.
Stocked as H70MD316 and sold individually. Check the compound against your process media, pressure and temperature before committing to a design.
Description -316 BLACK BUNA 70D O-RING
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 0.85 inch (21.59 mm)
Actual Outside Diameter 1.27 inch (32.26 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable