Flat Washer M4 A4 St/Stl Form B (4.3x9x0.7) DIN 4320

Flat Washer
Form B
Stainless Steel A4 Grade 316
Dia: M4
Dimension: 4.3 x 9 x 0.7mm
DIN: 4320
A BS 4320 (formerly DIN 4320) flat washer, made from A4 (Grade 316) "marine-grade" stainless steel, is a robust, large-diameter or thicker circular disc used to distribute fastener loads. Its primary purpose is to provide superior corrosion resistance and enhanced load-bearing capacity in heavy-duty structural applications within harsh environments like marine or chemical processing.