Value Collection ZMSCH70374 O-ring Dash 374 Nitrile Nbr

Product Description

The VALUE COLLECTION ZMSCH70374 is a Dash 374 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in sealing applications. It measures 9.25 inches inside diameter, 9.625 inches outside diameter, and 0.1875 inches (3/16 inches) thick with a round cross-section profile. Rated at 70 Shore A hardness, this O-ring delivers reliable compression set resistance along with strong tear and abrasion resistance. It is sold in a package quantity of 5 and is suited for installation by licensed plumbers, HVAC technicians, and mechanical contractors working with fluid or gas sealing systems.

This O-ring is designed for use in applications where petroleum-based fluids or gases are present, including hydraulic systems, pneumatic systems, fuel handling equipment, and general industrial or HVAC sealing points. Its Buna-N compound performs across a wide temperature range, from -40 degrees F to 250 degrees F, making it appropriate for both outdoor and mechanical room environments. It is not FDA approved and should not be used in food-contact or potable-water applications without confirming material suitability.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound — excellent resistance to petroleum products, hydraulic fluids, and fuels
• 70 Shore A hardness rating — hard durometer class for reliable sealing under compression
• Wide service temperature range: -40 degrees F to 250 degrees F
• Round cross-section profile conforms to Dash 374 standard dimensions
• Meets SAE and MIL-Spec standards
• Black color; package quantity of 5 per order unit

Compatibility

Compatible with petroleum products and petroleum-based hydraulic fluids per supplier specifications. Buna-N O-rings should not be exposed to ozone sources, direct sunlight during storage, or electrical equipment generating ozone, as these conditions degrade the elastomer over time.

Installation Notes

O-ring installation is typically performed by licensed plumbers, HVAC technicians, or mechanical contractors. Before replacing any O-ring, de-energize the system, relieve all pressure, and drain or isolate the fluid circuit. Lubricate the O-ring with a compatible lubricant — use only petroleum-compatible grease with Buna-N — and seat the ring evenly in its groove without twisting or stretching. Do not use tools with sharp edges that could nick or cut the sealing surface.