Value Collection ZMSCH90131 O-ring Dash 131 Nbr 50 Pack

Product Description

The VALUE COLLECTION ZMSCH90131 is a Dash 131 O-ring made from Nitrile Butadiene Rubber (Buna-N), one of the most widely used elastomers in sealing applications. It measures 1.688 inches inside diameter, 1.875 inches outside diameter, and 0.103 inches thick with a round cross section. Rated at 90 durometer (extra hard), this O-ring delivers strong compression set resistance along with excellent tear and abrasion resistance. The temperature range spans -40 degrees F to 250 degrees F. Licensed plumbers, HVAC technicians, hydraulic system mechanics, and industrial maintenance professionals commonly install this part wherever petroleum-based fluid sealing is required.

This O-ring is suited for residential and commercial applications involving petroleum-based hydraulic fluids, fuel systems, pneumatic fittings, pipe connections, and pump seals. The Buna-N compound resists degradation from petroleum products, making it a standard choice in HVAC refrigerant oil circuits, plumbing valve bodies, and general industrial fluid handling. Each order unit contains 50 O-rings, appropriate for shop stock or service van inventory restocking. This item does not carry FDA approval and is not intended for food-contact or medical-grade sealing applications.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction with excellent resistance to petroleum products
• 90 durometer extra-hard rating for high-compression-set applications
• Operating temperature range of -40 degrees F to 250 degrees F
• Round cross-section, Dash 131 standard sizing for consistent fitment
• Meets SAE and MIL-Spec standards
• Packaged in quantities of 50 per order unit

Compatibility

Designed for use with petroleum-based fluids and compatible systems per SAE and MIL-Spec standards. Suitable as a Dash 131 replacement O-ring in any application specifying a 1.688-inch ID Buna-N seal. Not compatible with ozone-generating environments, direct UV exposure during storage, or systems requiring FDA-compliant elastomers.

Installation Notes

Installation should be performed by a licensed technician or qualified mechanic following applicable system service procedures. De-pressurize and isolate the fluid circuit or pneumatic line before removing the existing seal. Avoid stretching the O-ring over sharp edges; use an installation tool when the gland geometry requires it. Do not store unused O-rings near motors, electrical equipment, or in direct sunlight, as ozone and UV exposure degrade Buna-N compound over time.