标准:
标准库
(9)
IFI 513-1982Metric hexagon head screws-Table 8
IFI 513-1982Metric small hexagon head screws-Table 8
IFI 541-1982Metric hex transmission tower bolts
IFI 149-2000Large size heavy hex screws
IFI 111-2002Hex flange screws-Table 8
IFI 536-1982Hex flange screws
IFI 538-1982Heavy hex flange screws
IFI 544-1998Round head ribbed neck bolts
IFI 115-2002Flange 12 points screws