GB Standard: GB/T 27;GB30; GB/T 31.1; GB/T 32.1; GB/T 5782; GB/T 5783; GB/T 5785; GB/T 5786
ISO Standard: ISO 4014; ISO 4016;ISO 4017; ISO 4018
DIN Standard: DIN 931;DIN 933
JIS Standard: JIS B 1180
Grade: 8.8; 10.9; 12.9; A2-50;A2-70;A2-80;A4-70;A4-80
WAS ME Standard: ASME/ANSI B 18.2.1
Grade: 5; 8
