946440
Flange Screw
Mack

A flange screw designed for high clamp load and even distribution over a flange surface, this fastener helps secure critical assemblies against vibration and dynamic forces encountered in trucking applications. The flange head reduces the need for washers by spreading clamping force across a broader area, which lowers the risk of loosening and work‑hardened threads under heavy use. Built from hardened alloy steel and finished for corrosion resistance, these screws are suitable for engines, frames, and other structural connections where reliability is essential. Correct selection of screw length, thread pitch, and engagement depth supports long‑term service life and consistent performance across temperature swings. When replacing, ensure proper torque values and inspect mating surfaces for debris or damage. For fitment confirmation and installation guidance, contact Source One Parts Center.