GB/T 819.2-2016
Countersunk flat head screws with type Z cross recess(shallow)
GB/T 13806.1-1992
Cross recessed cheese head screws for precision -Table1
GB/T 13806.1-1992
Cross recessed countersunk head screws for precision -Table2
GB/T 13806.1-1992
Cross recessed raised countersunk head screws for precision -Table3
GB 819-1976
Countersunk flat head screws cross recess
GB 818-1976
Cross recessed pan head screws
GB/T 818-1985
Pan head screws with type Z cross recess
GB/T 818-1985
Pan head screws with type H cross recess
GB/T 818-2000
Pan head screws with type H cross recess
GB/T 818-2000
Pan head screws with type Z cross recess
GB/T 67-2008
Slotted pan head screws
GB/T 833-1988
Slotted large cheese head screws
GB/T 6191-1986
6-Lobe cap screws，class 8.8
GB/T 949-1988
Slotted ralsed countersunk head screws with waisted shank
GB/T 839-1988
Knurled thumb screws with walsted shank-Type A
GB/T 839-1988
Knurled thumb screws with walsted shank-Type B
GB/T 835-1988
Knurled screws
GB/T 836-1988
Knurled screws with small head
GB/T 946-1988
Slotted raised cheese head with shoulder
GB/T 831-1988
Slotted shoulder screws
