Half Hex Nut M12 x 1.75 A4 Stainless Steel DIN 439

Half Nut
Hexagon
Metric
Stainless Steel A4 Grade 316
Dia: M12
Pitch: 1.75
DIN: 439
Wrench Size Across Flats: 19mm
The DIN 439 half hex nut is a low-profile, six-sided fastener made from A4 (Grade 316) "marine-grade" stainless steel, offering superior resistance to corrosion in harsh environments. Its main purpose is to serve as a lock nut (jam nut) in high-corrosion or high-vibration applications, or for use in assemblies with limited vertical space.