This determines the socket or wrench size needed. For example, ST 4.8 and ST 5.5 typically use an 8mm driver, while ST 6.3 uses a 10mm driver.

The DIN 7504 K standard covers a specific range of thread sizes and head dimensions to ensure mechanical reliability. 1. Dimensional Overview

The "drill point" (typically JP76 type) is designed to penetrate specific material thicknesses. Саморез DIN 7504 K - ЦКИ

While the German DIN standard remains widely used, it has been largely superseded by the international equivalent, . Technical Specifications and Dimensions

The standard specifies the requirements for self-drilling tapping screws with a hexagonal head and an integrated flange (stamped washer) . Often referred to as "Tek screws," these fasteners are engineered to drill, tap, and fasten in a single operation, eliminating the need for pre-drilled pilot holes in metal substrates.

Measured from the base of the flange to the top of the hex head.