GB/T 16939-1997

High strength bolts for joints of space grid structures

GB/T 32076.8-2017

Sets of torshear type high strength bolt hexagon nuts and plain washer for steel structures

MS 16207C-1967

Mushroom head square neck bolts

MS 16207C-1991

Mushroom head square neck bolts

MS 16207C-1999

Mushroom head square neck bolts

MS 20069B-1987

Mushroom head square neck bolts

MS 20069B-1993

Mushroom head square neck bolts

MS 20069B-1999

Mushroom head square neck bolts

MS 20069B-2004

Mushroom head square neck bolts

GB/T 8262-1987

Bolts,round head with oval neck

GB/T 801-2021

Cup head square neck bolts with small head and short neck

GB/T 794-2021

Strengthened cup head square neck bolts-Type A

DIN 5903-1-2011

With round head and oval neck