Value Collection 0406U No. 4 Round Head Sheet Metal Screw

Product Description

The VALUE COLLECTION 0406U is a No. 4 round head sheet metal screw with a Type U point, designed for fastening thin sheet metal, light-gauge steel components, and similar materials in mechanical and fabrication applications. The screw measures 3/8 inches in length under the head and is manufactured from Grade 1016/1024 carbon steel with a zinc finish for corrosion resistance. The Type U point is a blunt, interference-fit drive type commonly used for permanent or semi-permanent fastenings into pre-punched or drilled holes. This fastener is installed by electricians, HVAC technicians, sheet metal workers, and general tradespeople in light-duty assembly work.

This screw is suited for use in residential and commercial construction, HVAC duct assembly, electrical enclosures, appliance fabrication, and other applications requiring a compact No. 4 fastener in thin-gauge metal. Its round head profile provides a low-profile bearing surface appropriate for surface-mounted connections where flush seating is not required. The zinc finish offers baseline protection in indoor and sheltered environments.

Key Features

• No. 4 thread size with 3/8-inch length under head for compact fastening applications
• Type U blunt point designed for pre-punched or drilled holes in sheet metal
• Round head profile provides a broad bearing surface for surface-mounted installations
• Grade 1016/1024 carbon steel construction meets AISI 1016 material standards
• Zinc finish provides corrosion resistance in indoor and sheltered environments
• Meets ASME B18.6.3 and ASME B18.6.4 dimensional standards

Compatibility

Designed as a standard No. 4 round head Type U sheet metal screw suitable for use in pre-punched or drilled holes in light-gauge sheet metal assemblies, HVAC ductwork, electrical enclosures, and similar thin-material fastenings where ASME B18.6.3 and B18.6.4 compliant fasteners are specified.

Installation Notes

Sheet metal screws of this type are installed by sheet metal workers, HVAC technicians, and electricians using a manual or power screwdriver with the appropriate round head bit. Always ensure the receiving hole is properly pre-punched or drilled to the correct diameter for Type U point engagement before driving. Avoid over-torquing, which can strip the thin-gauge material or compromise the fastener seating. Follow applicable SMACNA or local mechanical codes when fastening ductwork components.