Value Collection R63288243 Brass Thumb Screw 5/16-18

Product Description

The VALUE COLLECTION R63288243 is a brass thumb screw with an oval head profile and a 5/16-18 UNC thread size. Designed for hand-tightening applications where tools are not practical, this fastener allows quick adjustments and secure clamping without a driver. The oval head provides a comfortable grip surface and a low-profile appearance once seated. With an overall length of 1.5 inches and a head diameter of 0.7 inches, this screw fits a range of light-duty mechanical and assembly applications. Brass construction offers corrosion resistance and is well-suited for environments where steel fasteners may oxidize or react with adjacent materials.

This thumb screw is used in instrument panels, access covers, jigs, fixtures, and equipment housings where frequent hand removal is required. The 5/16-18 UNC thread is a standard coarse-pitch inch thread, compatible with common tapped holes and threaded inserts found in general fabrication and assembly work. It is installed without a shoulder, meaning it threads fully without a smooth shank section between the head and the thread. Typical industries include electrical enclosure assembly, HVAC access panels, and light mechanical fabrication.

Key Features

• Oval head design provides a comfortable grip for hand-tightening without tools
• 5/16-18 UNC coarse-pitch thread for compatibility with standard tapped holes
• Brass material resists corrosion and minimizes galvanic reaction with non-ferrous assemblies
• Without-shoulder design threads from head to tip for maximum thread engagement
• Head diameter of 0.7 inches and head height of 0.78 inches for a low-profile seat
• Overall length of 1.5 inches suits a range of panel thicknesses and clearance depths

Compatibility

Designed as a standard UNC inch-series thumb screw for use in any application requiring a 5/16-18 tapped hole or threaded insert.

Installation Notes

Install by hand into a properly tapped 5/16-18 UNC hole or threaded insert. Do not use a driver or wrench to torque this fastener, as the oval head is designed for hand pressure only and the brass material can deform under excessive mechanical force. Inspect the mating threads for damage or contamination before installation. Brass is a softer alloy than steel, so avoid pairing with significantly harder steel threads in applications subject to vibration without a locking insert.