Electro Hardware THS3053M07F16 Thumb Screw 1/4-20

Product Description

The ELECTRO HARDWARE THS3053M07F16 is a 303 stainless steel knurled head thumb screw designed for hand-tightened fastening applications where tools are not practical or desirable. Threaded 1/4-20 UNC with an overall length of 13/16 inches, this thumb screw features a knurled head measuring 1/2 inch in diameter and 1/4 inch in height for a secure finger grip. The 303 stainless steel construction provides good corrosion resistance and machinability. The uncoated finish meets multiple material and finish standards including ASTM B633 and QQ-S-763. Licensed tradespeople and maintenance technicians install these fasteners in control panels, enclosures, access covers, and equipment assemblies.

This thumb screw is suited for use in HVAC equipment panels, electrical enclosures, junction boxes, and mechanical assemblies requiring frequent manual access. The 1/4-20 UNC thread is one of the most common coarse-thread sizes in North American trade equipment, making this fastener broadly applicable across residential and light commercial installations. The knurled head allows repeated removal and reinstallation without tools, supporting routine service intervals.

Key Features

• 303 stainless steel body for corrosion resistance in moderate environments
• 1/4-20 UNC coarse thread for compatibility with standard threaded inserts and nuts
• Knurled head design enables hand tightening and removal without tools
• 1/2 inch head diameter and 1/4 inch head height for positive finger grip
• 13/16 inch overall length with 9/16 inch thread engagement length
• Uncoated finish; meets ASTM B633, QQ-S-763, and related standards

Compatibility

Designed as a standard 1/4-20 UNC thumb screw replacement for use in equipment panels, enclosures, and mechanical assemblies that accept 1/4-20 threaded fasteners.

Installation Notes

Installation does not require special tools; hand-tighten only to avoid stripping the knurled head or thread. De-energize and lock out electrical panels or equipment before replacing fasteners on live enclosures, per applicable NFPA 70E safe work practices. Verify thread engagement length is sufficient for the material thickness before installing. Do not use impact drivers or wrenches on this fastener.