Value Collection ZMSCH70028 O-ring Dash 028 Nbr 70 Duro 100-pack

Product Description

The VALUE COLLECTION ZMSCH70028 is a Dash 028 Buna-N (Nitrile Butadiene Rubber) O-ring with a round cross section, sized at 1.375 inches inside diameter, 1.500 inches outside diameter, and 0.0625 inches thick. Rated at 70 Shore A hardness, this O-ring carries an operating temperature range of -40 degrees F to 250 degrees F and is engineered for excellent resistance to petroleum-based fluids. It is sold in packages of 100 and is a standard choice for HVAC, plumbing, hydraulic, and fluid-handling applications where reliable static or dynamic sealing is required. Licensed technicians and journeyman-level tradespeople routinely specify this material for fuel, oil, and refrigerant-adjacent service.

Buna-N is the most widely used O-ring elastomer in the trades and is well suited for residential and light commercial systems that handle petroleum products, hydraulic fluids, and similar media. This Dash 028 size is a common fitment in valve bodies, pump housings, pipe unions, and fittings where a 1.375-inch bore requires a reliable face or radial seal. The 100-piece package format supports shop stock, fleet maintenance kits, and service van inventory for technicians who replace O-rings frequently in the field.

Key Features

• Buna-N (NBR) elastomer delivers excellent resistance to petroleum products, hydraulic oils, and fuel-based media
• 70 Shore A durometer provides a firm, reliable seal with good compression set resistance
• Operating range of -40 degrees F to 250 degrees F suits most HVAC, plumbing, and hydraulic service conditions
• Round cross-section profile, 0.0625 inches thick, conforms to Dash 028 standard dimensions
• Tear and abrasion resistance extends service life in dynamic and cyclic-load applications
• Meets SAE and MIL-Spec standards; sold in a 100-piece pack for shop and van stock

Compatibility

Compatible with petroleum products and similar hydrocarbon-based media per supplier specifications. Designed as a standard Dash 028 replacement O-ring for valve assemblies, pump housings, pipe fittings, and fluid-system components that require a 1.375-inch inside diameter seal. Not recommended for exposure to direct sunlight during storage or use near motors and electrical equipment that generate ozone.

Installation Notes

O-ring replacement is performed by licensed plumbers, HVAC technicians, and hydraulic system mechanics depending on the application. Always shut off fluid supply and relieve system pressure before disassembling any fitting or valve housing. Inspect the groove and mating surfaces for scoring or corrosion before installing a new O-ring. Avoid rolling or twisting the O-ring during installation; light lubrication with a compatible fluid can aid seating without compromising the seal.