Value Collection 440035 Hex Lock Nut 3/8-16 Unc Pack of 10

Product Description

The VALUE COLLECTION 440035 is a 3/8-16 UNC hex lock nut featuring an expanding flex top design in 18-8 stainless steel with an uncoated finish. The flex top insert expands under torque to grip the mating fastener thread, resisting loosening from vibration and dynamic loads without damaging the thread for future disassembly. These nuts are manufactured to MIL-S-7742 military specifications, making them a reliable choice for applications requiring traceable materials standards. Licensed tradespeople and maintenance professionals working with stainless fasteners will find this nut appropriate for corrosion-sensitive environments. Sold in a package of 10 units.

This hex lock nut is suited for use in general mechanical assemblies, HVAC equipment frames, plumbing support structures, electrical enclosures, and marine or outdoor installations where corrosion resistance is a priority. The 3/8-16 UNC thread pattern is one of the most common inch-series coarse thread sizes, making these nuts compatible with a wide range of standard 3/8-inch fasteners used in residential and light commercial service work. The stainless steel construction resists rust and chemical exposure in wet or humid environments.

Key Features

• Expanding flex top insert resists vibration-induced loosening while allowing disassembly
• 18-8 stainless steel construction provides corrosion and oxidation resistance
• Uncoated finish suitable for use in corrosive or food-adjacent environments
• Meets MIL-S-7742 military specifications for materials traceability
• 3/8-16 UNC coarse thread — one of the most common inch-series fastener sizes
• Sold in a convenient pack of 10 units

Compatibility

Designed as a standard replacement or stocking hex lock nut for any application using 3/8-16 UNC inch-series coarse thread fasteners in stainless steel.

Installation Notes

Installation is appropriate for licensed mechanics, HVAC technicians, plumbers, and electricians working with 3/8-inch inch-series fasteners. De-energize and depressurize any system before replacing fasteners on live equipment. Use a calibrated torque wrench appropriate for stainless steel fasteners to avoid galling, which is common with austenitic stainless alloys — apply anti-seize compound if required by the application. Follow applicable codes such as NEC or IPC for fastener use in electrical or plumbing assemblies.