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Details:
1).raw material: Q195F or C1022A
2). zinc, yellow zinc, copper, or nickel palting
others:
1.CROSS RECESSED RAISED COUNTERSUNK HEAD WOOD SCREWS: DIN7995
2.CROSS RECESSED OVAL HEAD WOOD SCREWS: B.S.1210
3.OVEL COUNTERSUNK HEAD WOOD SCREWS: ANSI/ASME B18.6.1; IFI J-39(F-59)
4.OVEL COUNTERSUNK HEAD WOOD SCREWS: GB101-86
SLOTTED RAISED COUNTERSUNK HEAD WOOD SCREWS
