Gibraltar KN-25SS-G Check Nut 1/4-20 Unc Stainless Steel

Product Description

The GIBRALTAR KN-25SS-G is a round knurled check nut machined from stainless steel and designed for use with 1/4-20 UNC threaded fastener applications. Check nuts, also called jam nuts or lock nuts, are threaded against a primary nut or fitting to prevent loosening under vibration or cyclic load. This nut features an uncoated stainless steel finish, providing natural corrosion resistance without any applied coating. The knurled round head allows for finger-tightening or light tool engagement. With an overall height of 0.25 inches, a head diameter of 0.875 inches, and a base diameter of 0.625 inches, this nut suits installations where a low-profile locking fastener is required. It is used by HVAC technicians, plumbers, electricians, and general trade professionals in equipment assembly and mechanical securing applications.

This check nut is suited for light industrial, commercial, and residential trade applications where stainless steel corrosion resistance is required. Common installation scenarios include panel assembly, pipe fitting lockdown, valve packing glands, and equipment mounting. The 1/4-20 UNC thread standard is one of the most widely used coarse-thread sizes in North American trade work, making this nut compatible with a broad range of threaded rods, studs, and bolts in that size. It is sold individually with a minimum order quantity of one.

Key Features

• 1/4-20 UNC coarse thread for broad compatibility with standard threaded fasteners
• Stainless steel construction provides inherent corrosion resistance without a coating
• Round knurled head allows hand-tightening and easy grip during installation
• Low-profile design: 0.25 inches overall height fits tight clearance applications
• Uncoated finish eliminates coating thickness variability in precision fits
• Lightweight at 0.05 pounds per unit

Compatibility

Designed as an OEM-style replacement or service fastener for 1/4-20 UNC threaded assemblies requiring a round knurled check nut in stainless steel.

Installation Notes

Check nuts are installed by a licensed or skilled tradesperson and should be threaded onto the fastener by hand first, then snugged against the primary nut using an appropriate wrench or nut driver. Always ensure threads are clean and free of debris before installation. Power down or de-energize any equipment before accessing fastener locations inside electrical enclosures or mechanical panels. Follow applicable NEC, IPC, or IFGC guidelines as relevant to the system being serviced.