Half Hex Nut M30 x 3.5 Black Gr.5 DIN 439

Half Nut
Hexagon
Metric
Black / Self Color
Mild Steel Grade 5
Dia: M30
Pitch: 3.5
DIN: 439
Wrench Size Across Flats: 46mm
A DIN 439 mild steel nut is a low-profile hexagonal fastener, commonly referred to as a jam nut, thin nut, or half nut. It is approximately half the height of a standard hex nut (like DIN 934).
When made from mild steel (typically property class 04), it is designed for light-to-medium duty applications where space is restricted or high clamping force is not the primary requirement.