Bolt
Hexagon Head
Metric
Stainless Steel A4 Grade 316
Dia: M12
Pitch: 1.75
Length: 50mm
DIN 931
Wrench Size Across Flats: 19mm
A DIN 931 A4 stainless steel hexagon head bolt is a partially threaded fastener made from A4 (AISI 316, "marine grade") stainless steel, which includes molybdenum for superior resistance to chlorides and pitting corrosion. These bolts provide strong, durable, and highly corrosion-resistant structural joints for demanding environments such as marine applications, chemical processing plants, and coastal construction, where standard A2 stainless steel would be inadequate.
