Value Collection ZMSCH70318 O-ring Dash 318 Nitrile 50-pack

Product Description

The VALUE COLLECTION ZMSCH70318 is a Dash 318 O-ring made from Nitrile Butadiene Rubber (Buna-N), one of the most widely used elastomers in fluid sealing applications. It measures 1 inch inside diameter, 1.375 inches outside diameter, and 0.1875 inches thick with a round cross section. Hardness is rated at 70 Shore A (Hard). The material delivers excellent resistance to petroleum-based fluids, good compression set performance, and strong tear and abrasion resistance. This O-ring is installed by plumbers, HVAC technicians, and industrial maintenance professionals wherever a reliable petroleum-compatible seal is required. Sold in a pack of 50.

This O-ring is suited for hydraulic systems, pneumatic fittings, pumps, valves, and general fluid line connections where petroleum product exposure is expected. It performs across a wide temperature range, rated from -40 degrees F to 250 degrees F, making it appropriate for both indoor and outdoor service environments. It is not FDA approved and should not be used in food-contact or medical applications. Proper groove sizing to Dash 318 specifications is required for reliable sealing performance.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction with excellent petroleum product resistance
• Dash 318 standard sizing: 1 inch ID, 1.375 inches OD, 0.1875 inches thick
• 70 Shore A hardness rating for reliable compression and seal retention
• Operating temperature range: -40 degrees F to 250 degrees F
• Round cross section for consistent groove fit and sealing contact
• Meets SAE and MIL-Spec standards
• Pack of 50 units per package

Compatibility

Designed as a standard Dash 318 replacement O-ring compatible with petroleum-based fluid systems. Compatible materials include petroleum products. Not recommended for use with ozone-generating equipment, direct sunlight exposure during storage, or non-petroleum fluid systems without verifying elastomer compatibility.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or industrial maintenance mechanics during pump, valve, or fitting service. Depressurize and drain the system fully before removing existing O-rings. Inspect the groove for wear, scoring, or debris before seating the new O-ring. Lightly lubricate the O-ring with a compatible petroleum-based lubricant to ease installation and prevent rolling or twisting during assembly.