Value Collection ZMSCH70912 O-ring Dash 912 Nbr 70

Product Description

The VALUE COLLECTION ZMSCH70912 is a Dash 912 O-ring boss gasket designed for use with straight-thread tube fittings in fluid and pneumatic systems. Manufactured from Nitrile Butadiene Rubber (Buna-N), this round cross-section O-ring measures 0.924 inches inner diameter, 1.156 inches outer diameter, and 0.116 inches thick. It carries a Shore A hardness of 70, placing it in the hard rating category. Buna-N is the most widely used O-ring elastomer, offering excellent resistance to petroleum-based fluids, good compression set characteristics, and strong tear and abrasion resistance. Licensed HVAC technicians, plumbers, and fluid-system mechanics install this type of seal during fitting assembly and routine maintenance.

This O-ring is suited for use in hydraulic, pneumatic, and plumbing systems where contact with petroleum products is expected. It is rated for a temperature range of -40 degrees F to 250 degrees F, making it appropriate for a broad range of residential and light commercial service environments. The O-ring boss gasket configuration is specifically intended for straight-thread tube fitting connections, where it seats in a machined boss to form a static face seal. It conforms to SAE and MIL-Spec standards. This item is sold in packages of 100 with a minimum order quantity of 1.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction — excellent resistance to petroleum products and hydraulic fluids
• Dash 912 O-ring boss gasket for straight-thread tube fitting applications
• Shore A hardness of 70 for reliable compression set and sealing performance
• Operating temperature range: -40 degrees F to 250 degrees F
• Round cross-section profile; black color
• Meets SAE and MIL-Spec standards

Compatibility

Compatible with petroleum-based fluids and hydraulic media. Designed as an O-ring boss gasket for straight-thread tube fittings per SAE and MIL-Spec standards. Not FDA approved; not recommended for food-contact or ozone-heavy environments, or for direct sunlight exposure during storage.

Installation Notes

Installation is typically performed by HVAC technicians, plumbers, or hydraulic system mechanics during fitting assembly or seal replacement. Depressurize and isolate the system completely before removing any existing fittings or seals. Lubricate the O-ring lightly with a compatible fluid before seating it in the boss recess to prevent rolling or pinching during assembly. Do not store O-rings near motors, electrical equipment, or in direct sunlight, as ozone and UV exposure degrade Buna-N material over time.