Value Collection ZMSCH70135 O-ring Dash 135 Nitrile Buna-n

Product Description

The VALUE COLLECTION ZMSCH70135 is a Dash 135 O-ring in Buna-N (nitrile butadiene rubber) with a round cross section, designed for static and dynamic sealing applications across plumbing, hydraulic, pneumatic, and fluid-handling systems. It measures 1.938 inches inside diameter, 2.125 inches outside diameter, and 0.0937 inches thick. The compound carries a Shore A hardness of 70 and is rated for service from -40 degrees F to 250 degrees F. Buna-N is the most widely used O-ring elastomer in the trade, offering reliable sealing against petroleum-based fluids, oils, and fuels. Licensed plumbers, HVAC technicians, and hydraulic system mechanics reach for this material class by default when working with petroleum-compatible media.

This O-ring is suited for residential and commercial installations where petroleum-product contact is expected, including fuel lines, hydraulic cylinders, compressor connections, and valve assemblies. The Dash 135 designation follows the AS568 standard sizing series, making it a recognized cross-reference size for replacement and new-build work. It meets SAE and MIL-Spec standards, which broadens its use into light industrial and equipment maintenance contexts. Package quantity is 100 units per order, making it practical for service fleets and shop stock replenishment.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound — excellent resistance to petroleum products, oils, and fuels
• Shore A hardness of 70, rated Hard, for dependable compression set performance
• Operating range of -40 degrees F to 250 degrees F
• Round cross section, Dash 135 designation per AS568 sizing series
• Meets SAE and MIL-Spec standards
• Good tear and abrasion resistance for dynamic sealing applications

Compatibility

Compatible with petroleum products and petroleum-based fluids. Not FDA approved; not suitable for food-contact or medical applications. Should not be stored in direct sunlight or near motors or electrical equipment that may generate ozone.

Installation Notes

O-rings should be installed by a qualified plumber, HVAC technician, or hydraulic system mechanic following applicable system codes. Clean the gland and mating surfaces before installation and confirm the gland dimensions match the Dash 135 specification. Lubricate the O-ring with a compatible fluid — petroleum-based lubricants are acceptable for Buna-N — before seating to prevent rolling or pinching during assembly. Never reuse a removed O-ring; replace with a new unit to ensure a reliable seal.