This part specifies hexagon socket low cylinders with thread specifications M2~M10, performance grades 4.8, 5.8, A2-50, A2-70, A3-50, A3-70, CU2 and CU3, and product grade A grade. head screws. If other technical requirements are required, they should be selected from current standards (such as GB/T 193, GB/T 9145, GB/T 3106, GB/T 3098.1, GB/T 3098.6 and GB/T 3103.1).
GB/T 2671.1-2004 history
2017GB/T 2671.1-2017 Hexalobular socket cheese (short) head screws
1986GB/T 6190-1986 Hexagon lobular socket head cap screws--Property class 4.8
0000 GB 2671-1981
GB/T 2671.1-2004 Hexalobular socket cheese(short)head screws has been changed from GB/T 6190-1986 Hexagon lobular socket head cap screws--Property class 4.8.