GB/T 29.2-2013
Cross recessed hexagon bolts with indentation
Q 174B-1999
Cross recessed hexagon bolts with indentation
GB/T 29.2-1988
Cross recessed hexagon bolts with indentation
ASME/ANSI B18.6.3-30-2013
Phillips concave hex head screws-Table 30
ASME/ANSI B18.6.3-30-2013
Phillips concave large hex head screws-Table 30
ASME/ANSI B18.6.3-31-2013
Phillips hex head screws-Table 31
ASME/ANSI B18.6.3-31-2013
Phillips large hex head screws-Table 31
Q 174B-2012
Cross recessed hexagon bolts with indentation
MIL B87114/4-1983
Cross recess with pin hexagon bolts
MIL B87114/4-1983
Cross recess with pin hexagon bolts with holes on head