Gibraltar 853315-G Round Knurled Check Nut 3/8-16 Unc

Product Description

The GIBRALTAR 853315-G is a round knurled check nut used to lock threaded fastener assemblies against loosening under vibration or repeated adjustment. Machined from steel with a black oxide finish, this check nut features a 3/8-16 UNC thread and is designed to seat firmly against a mating nut or component surface. The knurled head profile provides a positive grip for hand-tightening without tools in many applications. At 7/16 inches overall height with a 1-inch head diameter and a 3/4-inch base diameter, it suits compact fastening arrangements in mechanical and light industrial assemblies. Electricians, plumbers, HVAC technicians, and mechanical contractors encounter check nuts in panel, bracket, and equipment-mounting applications.

This check nut is suited for use in residential and light commercial applications where a 3/8-16 UNC threaded locking fastener is required. Typical install scenarios include securing control panels, equipment housings, conduit fittings, and other mechanical assemblies where threaded components must be locked against rotation. The black oxide finish provides mild corrosion resistance in interior environments. This part is sold individually with a minimum order quantity of 2 units.

Key Features

• 3/8-16 UNC thread for broad compatibility with standard inch-series fastener assemblies
• Round knurled head allows hand-tightening and positive grip without a wrench in many applications
• Black oxide finish offers mild corrosion resistance suited to interior or protected environments
• Steel construction provides durable locking performance under vibration
• Compact profile: 7/16 inches overall height with 1-inch head diameter and 3/4-inch base diameter

Compatibility

Designed as a standard check nut for use with 3/8-16 UNC threaded fastener assemblies in mechanical, electrical, and HVAC panel or bracket applications.

Installation Notes

Check nuts are installed by a qualified trade technician as part of a threaded fastener assembly. De-energize or shut down any equipment before accessing fastener locations near electrical or pressurized components. Hand-tighten the knurled check nut against the mating nut or surface, then confirm seating before returning equipment to service. Follow applicable NEC or mechanical code requirements for fastener selection in your specific application.