QC/T 873-2011
6-Lobe 90°oval head self drilling screws with tapping screw thread
QC/T 874-2011
6-Lobe 90°flat head self drilling screws with tapping screw thread
QC/T 875-2011
6-Lobe pan head self drilling screws with tapping screw thread
Q 260-1999
6-Lobe cheese cheese head thread rolling screws
Q 261-1999
Hexagon head thread forming screws
Q 262-1999
Cross recessed pan head thread forming screws
Q 263-1999
Cross recessed countersunk head thread forming screws
Q 264-1999
Cross recessed raised countersunk head thread forming screws
Q 270-1999
Type H hexagon flange head tapping screws-type A-type C
Q 270-1999
Type H hexagon flange head tapping screws-type A-type F
Q 272-1999
Type H cross recessed pan head tapping screws and plain washer assemblies-type A-type F
Q 271-1999
Type H cross recessed pan head tapping screws and plain washer assemblies-type A-type C
QC/T 602-1999
Type H cross recessed round head tapping screws-type A-type C
QC/T 602-1999
Type H cross recessed round head tapping screws-type A-type F
Q 273-1999
Type H cross recessed round head tapping screws-type A-type F
Q 273-1999
Type H cross recessed round head tapping screws-type A-type C
Q 278-1999
Type H cross recessed countersunk head tapping screws-type A-type F
Q 274-1999
Type H cross recessed countersunk head tapping screws-type A-type C
Q 275-1999
Type H cross recessed hexagon head tapping screws with indentation-type A-type F
Q 275-1999
Type H cross recessed hexagon head tapping screws with indentation-type A-type C
