GB/T 971-2008
Thread rolling cylindrical dies (English Version)
- Standard No.
- GB/T 971-2008
- Language
- Chinese, Available in English version
- Release Date
- 2008
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 971-2008
- Replace
- GB/T 971-1994
- Scope
- This standard specifies the basic requirements for the type, size and deviation, technical requirements, marking and packaging of thread rolling wheels for ordinary threads. This standard applies to thread rolling wheels for processing ordinary threads (GB/T 192-193, GB/T 196-197). Thread rolling wheels are divided into three precision grades: 1st, 2nd and 3rd grades. Grade 1 is suitable for processing external threads with tolerance grades 4 and 5; grade 2 is suitable for processing external threads with tolerance grades 5 and 6; grade 3 is suitable for external threads with processing tolerance grades 6 and 7 .
GB/T 971-2008 Referenced Document
- GB/T 192 General purpose metric screw threads--Basic profile
- GB/T 193 General purpose metric screw threads--General plan
- GB/T 196 General purpose metric screw threads--Basic dimensions
- GB/T 197 General purpose metric screw threads—Tolerances*， 2018-03-15 Update
GB/T 971-2008 history
- 2008 GB/T 971-2008 Thread rolling cylindrical dies
- 1994 GB/T 971-1994 Thread rolling cylindrical dies
