Chipboard Screws

screw :-  Specification:- screw standard:-DIN 934,985, 439, A563 DH,10S 2H, Gr 4, Gr7, B8, B8M,A2,A4, SS316L, B8, B8M    screw Materials:-Carbon steel, stainless steel, F436M,SS304, SS316L, SPRING,TAPER, PLATE,SS3164.6. CARBON STEEL,ASTM a36, 8.8 ,b7, a307, a325, a490,    Diameter : 3.5(#6),3.9(#7),4.2(#8),4.8(#10) *Length:1/2",3/4"5/8".1",2",2-1/2"......4"  *Surface: Yellow Zinc, Black, Blue, Nickel, Galvan-coating  *Material: SteelC1022,harden higher resistance for special applications.  *