The DIN 7504 K standard covers a specific range of thread sizes and head dimensions to ensure mechanical reliability. 1. Dimensional Overview
The integrated flange provides a larger bearing surface to distribute the load. Thread Size Width Across Flats (s) Head Height (k max) Washer Diameter (dk max) ST 3.5 ST 4.2 ST 4.8 ST 5.5 ST 6.3 Data compiled from various technical datasheets. 2. Drilling Capacity din 7504 k standard pdf
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
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. Thread Size Width Across Flats (s) Head Height