Buna 70-155-Black-Pk50

This Buna-N NBR 70A Bagged O-Ring Pack, item SB-H70155-50, is designed for buyers who need a clear specification match for organized replacement seal inventory, maintenance kits and repeat-use service parts. The item is specified by AS568-155; 3.987 inch (101.27 mm) ID x 0.103 inch (2.62 mm) CS; 4.193 inch (106.5 mm) OD, with 4 inch nominal ID; 3/32 inch nominal CS for cross-reference against common gland and replacement dimensions. Its Buna-N nitrile (NBR) material provides oil, grease, fuel and general hydraulic fluid resistance in common industrial equipment. It is with a listed temperature range of -40°F (-40°C) to 250°F (121°C), which can help narrow material selection for heat, cold or process exposure. The black color and round profile provide a practical visual identifier during receiving, stocking and installation. The bagged pack structure is well suited for distributors, maintenance departments and users who repeatedly service the same seal size. The bagged unit format is useful for organized maintenance inventory, reseller stocking and repeat replacement work. Common purchasing identifiers for this product include the material name, O-ring type, dimensional size, hardness and intended sealing application. Those attributes make the item easier to compare for maintenance, OEM production, MRO replacement and reseller catalog use.