DIN 934 is the traditional German standard for Hexagon Nuts, specifying dimensions and technical delivery conditions for metric nuts. It is the most ubiquitous internal thread fastener, designed to be paired with bolts, screws, and studs of corresponding metric thread sizes and property classes.

Available in both coarse and fine pitches, DIN 934 nuts provide a reliable internal thread for clamping bolted joints. While technically succeeded by ISO 4032, DIN 934 remains the industry baseline for commercial and non-critical industrial applications due to its long-standing global inventory and availability.

The primary engineering function of a DIN 934 nut is thread engagement and load transfer. The nut height ($m$) is carefully proportioned to ensure sufficient thread shear area to withstand the proof load of its designated property class (e.g., Grade 8 or 10). When a bolt is tightened into a DIN 934 nut, the resulting clamping force secures the assembly, with the nut's hexagonal shape allowing for easy wrenching and torque application.