stainless square nuts;DIN 557
Material: stainless steel 200,304,316 ,carbon steel
Surface: zinc plated (Yellow/white/blue zinc )
Standard:DIN, ANSI, JIS, BS
Size: M4-M20
Grade:A2,A4
Packing: box or bulked in carton ;pallet 20-25kgs/carton
Customized packing is accepted