Gibraltar Z0736 Thumb Screw 4-40 Knurled Head 18-8 Stainless Steel

Product Description

The GIBRALTAR Z0736 is an 18-8 stainless steel thumb screw with a 4-40 UNC thread and a knurled head design for tool-free hand tightening. Manufactured without a shoulder, this fastener has an overall length of 1-3/8 inches, a head diameter of 3/16 inches, and a head height of 3/8 inches. The 18-8 stainless steel construction provides corrosion resistance suitable for indoor and light outdoor applications. It follows inch-measurement standards and is sold individually. Electricians, panel fabricators, HVAC technicians, and equipment assemblers commonly use this type of fastener when frequent access or adjustment is needed without tools.

This thumb screw is suited for light-duty fastening tasks in control panels, enclosures, junction boxes, and equipment covers. Its 4-40 UNC thread is a fine, small-diameter designation widely used in electrical and instrumentation assemblies. The knurled head allows finger-tightening in confined spaces where a screwdriver cannot be used. It is appropriate for both residential and commercial equipment assembly and maintenance applications.

Key Features

• 18-8 stainless steel construction for corrosion resistance
• 4-40 UNC thread for compatibility with standard small-diameter tapped holes
• Knurled head design allows tool-free hand tightening and loosening
• Without-shoulder configuration for flush or recessed seating
• Inch measurement system with overall length of 1-3/8 inches
• Individually packaged, sold as a single fastener

Compatibility

Designed as a replacement or supplemental fastener for equipment assemblies requiring a 4-40 UNC thread thumb screw with a knurled head in stainless steel.

Installation Notes

Installation is typically performed by hand; no special tools are required for tightening. Verify the mating thread in the receiving component is 4-40 UNC before installation to avoid cross-threading or thread damage. De-energize any electrical panel or enclosure before servicing fasteners on live equipment covers. Do not overtighten by hand or with tools, as small-diameter stainless fasteners are susceptible to galling.