Value Collection ZMSCH70138 O-ring Dash 138 Buna-n 50-pack

Product Description

The VALUE COLLECTION ZMSCH70138 is a Dash 138 O-ring manufactured from Buna-N (nitrile butadiene rubber), one of the most widely used elastomers in fluid sealing applications. It measures 2.125 inches inside diameter, 2.313 inches outside diameter, and 0.094 inches thick with a round cross section. Rated at 70 Shore A hardness, this O-ring delivers reliable compression set performance along with strong tear and abrasion resistance. It is sold in a package of 50 and is appropriate for use by plumbers, HVAC technicians, hydraulic system technicians, and industrial maintenance professionals working with petroleum-based media.

This O-ring is suited for static and dynamic sealing applications where contact with petroleum products, hydraulic fluids, or oils is expected. The Buna-N compound performs across a working temperature range of -40 degrees F to 250 degrees F, making it a practical choice for residential and commercial plumbing, refrigeration service, fuel systems, and general industrial fluid handling. It conforms to SAE and MIL-Spec standards. Note that this elastomer should not be stored in direct sunlight or near motors and other electrical equipment that may generate ozone.

Key Features

• Buna-N (nitrile butadiene rubber) construction — excellent resistance to petroleum products and hydraulic fluids
• Dash 138 sizing: 2.125 inches ID, 2.313 inches OD, 0.094 inches thick, round cross section
• 70 Shore A hardness rating for firm compression set and abrasion resistance
• Operating temperature range: -40 degrees F to 250 degrees F
• Meets SAE and MIL-Spec standards
• Packaged in quantities of 50 for shop stock or service van inventory

Compatibility

Compatible with petroleum products and petroleum-based hydraulic fluids. Designed as a standard Dash 138 O-ring for use in any groove or port that accepts the AS568 Dash 138 O-ring dimension standard.

Installation Notes

Installation should be performed by a qualified technician following applicable codes such as the IPC for plumbing applications or manufacturer service documentation for HVAC and hydraulic equipment. Shut off fluid supply and relieve system pressure completely before replacing any O-ring seal. Lubricate the O-ring with a compatible fluid or assembly lubricant before seating to prevent tearing during installation. Do not use petroleum-based lubricants with elastomers not rated for petroleum compatibility.