Value Collection ZMSCH90241 O-ring Dash 241 Nbr 90 Duro

Product Description

The VALUE COLLECTION ZMSCH90241 is a Dash 241 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in fluid sealing applications. It measures 3.875 inches inner diameter by 4.125 inches outer diameter with a 0.125-inch cross-section thickness. Rated at 90 durometer (extra hard), this O-ring delivers excellent compression set resistance along with strong tear and abrasion resistance. Its operating temperature range spans -40 to 250 degrees F, making it suitable for a broad range of service environments. Licensed plumbers, hydraulic technicians, and industrial maintenance professionals specify this compound for petroleum-based fluid systems.

Buna-N O-rings in the Dash 241 size are commonly used in hydraulic fittings, pneumatic assemblies, pump housings, valve stems, and pipe flange seals where petroleum-based fluids or oils are present. This size is a standard fit in many industrial and trade applications including HVAC refrigerant-adjacent fittings, plumbing equipment, and fluid power components. Each package contains 25 O-rings. Note: Buna-N should not be stored in direct sunlight or near motors and other electrical equipment that may generate ozone, as ozone exposure degrades this elastomer over time.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound offers excellent resistance to petroleum products and hydraulic fluids
• 90 durometer extra-hard rating provides strong compression set and dimensional stability under pressure
• Wide temperature range of -40 to 250 degrees F suits diverse industrial and trade service conditions
• Round cross-section profile meets SAE and MIL-Spec standards for dimensional consistency
• Sold in a 25-piece package quantity for bench stock and service kits

Compatibility

Designed for use with petroleum-based products and hydraulic fluids. Meets SAE and MIL-Spec dimensional standards for Dash 241 O-rings. Not FDA approved. Not recommended for use with ozone, sunlight exposure during storage, or systems requiring FDA-compliant elastomers.

Installation Notes

O-ring installation should be performed with the system fully depressurized and the fluid supply isolated. Lightly lubricate the O-ring with a compatible fluid before seating to prevent pinching or rolling during assembly. Avoid using sharp tools that may nick the sealing surface of the O-ring or the gland. Consult applicable system service documentation to verify gland dimensions and compression ratio before installation.