Value Collection ZMSCH70380 O-ring Dash 380 Nbr 5 Pack

Product Description

The VALUE COLLECTION ZMSCH70380 is a Dash 380 nitrile butadiene rubber (NBR) O-ring with a round cross section, measuring 11.5 inches inside diameter, 11.875 inches outside diameter, and 0.1875 inches thick. Rated at 70 durometer hardness, this Buna-N elastomer is the most widely used O-ring material in the trade. It delivers excellent resistance to petroleum products, strong compression set performance, and solid tear and abrasion resistance. Licensed plumbers, HVAC technicians, and industrial maintenance professionals install this seal wherever fluid or gas containment requires a proven elastomeric O-ring in petroleum-compatible service.

This O-ring is suited for use in hydraulic systems, pneumatic assemblies, plumbing connections, fuel systems, and general industrial sealing applications where exposure to petroleum-based fluids is expected. The Dash 380 designation corresponds to a standardized AS568 size, making it a direct fit in equipment engineered to that dash-number specification. Each order includes 5 O-rings. Operating temperature range is -40 degrees F to 250 degrees F, covering most residential and light commercial service conditions.

Key Features

• Buna-N (NBR) elastomer: excellent petroleum product resistance for fuel, oil, and hydraulic fluid service
• 70 durometer hardness rating for a firm, reliable seal under compression
• Round cross section, standardized Dash 380 sizing per SAE and MIL-Spec standards
• Wide service temperature range: -40 degrees F to 250 degrees F
• Black color; UV and ozone sensitivity warrants proper storage away from direct sunlight and electrical equipment
• Sold in a 5-piece package; minimum order quantity of 1

Compatibility

Designed for use in any application calling for a Dash 380 O-ring in Buna-N material, including petroleum-based fluid systems, hydraulic circuits, pneumatic fittings, and plumbing assemblies compatible with NBR elastomers. Not compatible with ozone, strong acids, ketones, esters, or chlorinated hydrocarbons.

Installation Notes

O-ring installation is performed by licensed plumbers, HVAC technicians, or qualified industrial maintenance personnel depending on the application. Before replacing any O-ring, depressurize and de-energize the system, then purge residual fluid per applicable safety procedures. Lightly lubricate the O-ring with a compatible lubricant before seating to prevent rolling or cutting during assembly. Do not store unused O-rings in direct sunlight or near motors and electrical equipment that may generate ozone, as this degrades NBR elastomers over time.