Value Collection 39623 Hex Lock Nut 3/8-16 Grade 8

Product Description

The VALUE COLLECTION 39623 is a 3/8-16 hex lock nut with a nylon insert locking mechanism, manufactured from Grade 8 steel with a bright, uncoated finish. The nylon insert deforms around the mating thread when fully seated, creating resistance to vibration-induced loosening without the need for thread-locking compounds or additional hardware. At 29/64 inches in height and 9/16 inches across the flats, this nut conforms to UNC thread standards and is driven with standard hex tooling. Grade 8 steel construction provides high tensile strength suited to structural and heavy-duty mechanical fastening applications across HVAC, plumbing, and general mechanical assembly work.

This nut is used wherever a 3/8-16 UNC right-hand thread fastener requires reliable locking in vibration-prone or high-stress environments. Typical applications include equipment mounting, sheet metal subframes, mechanical brackets, and structural connections in residential and light commercial mechanical systems. The bright uncoated finish is appropriate for indoor or protected installations where corrosion exposure is minimal. This SKU is sold individually but carries a minimum order quantity of 100 units, making it suited for stocking in trade shop inventory or job-site supply kits.

Key Features

• Nylon insert locking style resists vibration-induced loosening without thread-locking compounds
• Grade 8 steel construction for high tensile strength in heavy-duty fastening applications
• 3/8-16 UNC right-hand thread, compatible with standard 9/16-inch hex tooling
• 29/64-inch height and 9/16-inch width across flats per UNC fastener standard
• Bright uncoated finish suited for dry or protected indoor installations
• Minimum order quantity of 100 units supports trade shop and job-site bulk stocking

Compatibility

Designed for use with any 3/8-16 UNC right-hand threaded bolt or stud in standard inch-measurement mechanical and structural fastening applications.

Installation Notes

Installation is performed by hand using a 9/16-inch hex wrench or socket driver. Power down or isolate any equipment before replacing or installing fasteners in live mechanical assemblies. Nylon insert lock nuts are single-use by design; do not reuse a previously installed nylon insert nut, as the insert loses locking effectiveness after initial seating. Torque to the fastener manufacturer's specification for Grade 8 hardware at this thread size.