Half Hex Nut M20 x 2.5 A2 Stainless Steel DIN 439

Half Nut
Hexagon
Metric
Stainless Steel A2 Grade 304
Dia: M20
Pitch: 2.5
DIN: 439
Wrench Size Across Flats: 30mm
The DIN 439 half hex nut is a low-profile, six-sided fastener made from A2 (Grade 304) stainless steel, offering good corrosion resistance. Its main purpose is to serve as a lock nut (jam nut) in conjunction with a full nut to prevent loosening, or for use in applications with limited vertical space.