4 X 3/8″ Type AB Self Tapping Sheet Metal Screws Flat Undercut Head Six Lobe Drive Steel Zinc & Bake (10000/Pkg.) Buy Direct

10,000-unit bulk pack of Type AB Self Tapping Sheet Metal Screws designed for direct threading into steel substrates. The flat undercut head and six lobed drive enable precise torque control and consistent seating in metal assemblies.

Specs

Diameter: #4

Length: 3/8″

Finish: Zinc plated with baked enamel

Drive type: Six Lobe Drive

Thread type: Self-tapping

Features

Self-tapping design enables threading into sheet metal without pre-drilling, reducing assembly steps and tooling requirements.

Six Lobe Drive provides high torque transfer with reduced cam-out compared to traditional Phillips drives, and is compatible with matched bit inserts.

Flat Undercut Head offers a low-profile seating that sits flush against the surface, minimizing protrusion in confined assemblies.

Finish: Zinc plating with baked enamel coating delivers corrosion resistance and enhanced wear performance in typical service environments.

Applications: Ideal for sheet metal fastening in automotive trim, electrical enclosures, HVAC components, and metal furniture assemblies requiring quick, reliable installation.

Bulk packaging: 10,000 unit quantity reduces replenishment frequency for production lines and maintenance operations.

Recommended tooling: Utilize a six lobed driver or equivalent high-torque bit to maximize insertion torque and minimize cam-out; ensure pilot hole size aligns with #4 screws.