25097839
Hex Washer-Head Tapping Screw
Mack

A self-tapping hex washer-head screw designed for fast, secure attachment into sheet metal and similar substrates. The tapping feature enables clean thread formation without pre-drilling, reducing assembly time on production lines or during field repairs. The washer head helps distribute load and provide a weather- and vibration-resistant seal around the screw, reducing pull-out risk and increasing joint stiffness. This screw is well-suited for securing panels, brackets, and housings where a low-profile, flush finish is desirable. Proper installation relies on selecting the correct diameter and length for the target substrate, applying steady torque to avoid thread stripping, and ensuring the pilot hole (if required) aligns with the intended fastener path. In fleet maintenance, this fastener minimizes risk of loose components that could interfere with moving parts or affect aerodynamics. Source One Parts Center notes its value as a reliable, general-purpose fastener for metal-to-metal applications.