Value Collection 3/8-24 AJ6MC Brass Hex Jam Nut Unf 5-pack

Product Description

The VALUE COLLECTION 3/8-24 AJ6MC is a brass self-sealing hex jam nut designed for use in threaded fastening applications that require a reliable fluid or gas seal. The nut features a nickel-plated finish over a brass body and incorporates a silicone O-ring that compresses on installation to prevent leakage at the thread interface. It follows a right-hand UNF (Unified National Fine) thread standard at 3/8-24. The hex profile measures 9/16 inches wide, and the overall height is 7/32 inches. This hardware is commonly installed by plumbers, HVAC technicians, and mechanical contractors who need a low-profile locking nut with integrated sealing in tight fluid system assemblies.

This jam nut is suited for residential and light commercial plumbing, HVAC refrigerant line fittings, and pneumatic or hydraulic assemblies where a standard lock nut without sealing capability is insufficient. The 3/8-24 UNF thread pitch is commonly found on tubing fittings, valve stems, and instrument ports. The silicone O-ring seat allows the nut to seal against a mating surface without thread sealant tape, reducing installation steps in high-cycle or vibration-prone environments. Each package contains 5 nuts, sold at a minimum order quantity of 1 package.

Key Features

• Brass construction with nickel plating for corrosion resistance in wet or humid environments
• Integrated silicone O-ring provides a self-sealing function at the thread interface
• 3/8-24 UNF right-hand thread for compatibility with fine-thread fittings and ports
• Hex jam nut profile at 9/16 inches wide allows standard wrench access in confined spaces
• Low-profile 7/32 inch height suits assemblies with limited axial clearance
• Sold in a 5-piece package with a minimum order quantity of 1

Compatibility

Designed for use with 3/8-24 UNF right-hand threaded fastening applications requiring an integrated O-ring seal, including tubing fittings, valve stems, and instrument port connections.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or mechanical tradespeople using a standard open-end or combination wrench sized to 9/16 inches. Depressurize and isolate any fluid or gas line before removing or installing sealing hardware. Do not overtighten, as excessive torque can deform the silicone O-ring and compromise the seal. Confirm thread direction and pitch before installation to avoid cross-threading.