Gibraltar TS-307-G Steel Thumb Screw 5/16-18 Knurled

Product Description

The GIBRALTAR TS-307-G is a steel thumb screw designed for tool-free fastening in applications where frequent manual adjustment or removal is required. It features a black plastic knurled head for positive hand grip and a zinc-plated steel shank that provides corrosion resistance in light-duty environments. The 5/16-18 UNC thread is a common coarse-thread standard, making this fastener straightforward to source and replace. The screw includes a shoulder section below the head, which can serve as a locating or clamping feature in panel and enclosure assemblies. At 0.06 pounds, it is a lightweight single-unit fastener suited for repeated hand operation.

This thumb screw is used in industrial, electrical, and mechanical assembly contexts where panels, covers, guards, or access doors need to be secured without tools. Typical applications include equipment enclosures, control panels, rack-mount hardware, and machinery guards. It is well suited for maintenance technicians, electricians, and equipment assemblers who need a reliable, hand-operable fastener in light- to medium-duty installations.

Key Features

• 5/16-18 UNC coarse thread for broad compatibility with standard tapped holes
• Black plastic knurled head for comfortable, tool-free tightening and loosening
• Shoulder design assists with panel alignment and clamping applications
• Zinc-plated steel shank provides corrosion resistance in indoor environments
• Compact head profile at 1.18 inches diameter and 0.43 inches height

Compatibility

Designed as a standard 5/16-18 UNC thumb screw for use in any application with a compatible tapped hole or threaded insert of the same thread specification.

Installation Notes

Installation is performed by hand without tools in most applications. Ensure the mating tapped hole or threaded insert is clean and undamaged before threading in the fastener. Do not use power tools or wrenches on the plastic knurled head, as this can crack or strip the head. Verify that the shoulder diameter and length are compatible with the panel thickness and hole geometry of the specific assembly.