The tooth profile angle of common thread is

The tooth profile angle of ordinary thread is 60 degrees. The main thread types are: common thread, trapezoidal thread, rectangular thread and sawtooth thread. The first two threads are mainly used for connection, and the last three threads are mainly used for transmission. Among them, except rectangular thread, other threads have been standardized. Extended information: Standard Manual for Metric, American and English Threads; Standard name, standard number and relationship with international standards of China general thread catalogue GB/T192-1981equivalent to ISO68. Common thread diameter and pitch series GB/T193-1981is equivalent to ISO26 1. The basic dimensions of common thread GB/T196-1981are equivalent to ISO724. Tolerance and Fit of Common Threads GB/T197-1981is equivalent to ISO965/ 1. Common thread deviation table GB/T 2516—1981is equivalent to ISO965/3. JB/T7912-1999 for commercial fasteners is equivalent to ISO262. "Straight Thread Selection Series Commercial Fasteners" GB/T9145-1988 is equivalent to ISO965/2. Equal precision common thread limit size optical thread special fine thread ZBN 30006- 1988- eyepiece thread JB/T8204- 1995 short thread JB/T5450- 199 1 tight thread transition thread GB/t/kloc-0. 996- interference fit threads GB/T 196 Small thread diameter and pitch series GB/T 1505 4.2- 1994 Small thread basic dimensions GB/ T 1505 4.3- 1994 Small thread tolerance GB/T. T 15054.5- 1994MJ thread basic tooth MJ thread GJB/T3.1-kloc-0/982 iso5855 mj bolt and nut thread size and tolerance GJB/T3.2- 1982 MJ threaded pipe thread size and tolerance GJB. Dimensions and tolerances of 985MJ thread structure GJB/T3.4—198 The basic dimensions of trapezoidal thread GB/T5796 .3— 1986 are equivalent to ISO2904. The tolerance of trapezoidal thread GB/T5796 .4— 1986 is equivalent to ISO2903. Limit size of trapezoidal thread GB/T 12359- 1990- Technical requirements for trapezoidal screw nut for machine tools JB/T 2886- 1992 Short trapezoidal thread JB/TQ374- 1985 Sawtooth thread tooth type (3 .30) 30) Thread diameter and pitch series GB/ T 13576.2- 1992 Sawtooth (3.30) Thread basic dimensions GB/ T65438+. T 13576.4- 1992 Tooth profile and basic dimensions of 45 serrated thread of hydraulic press JB 2076- 1984 "Thread Sealing Pipe Thread" GB/GB/T7306-1987 is equivalent to ISO 7//KLOC-0. The pipe thread in the threadless seal GB/T 7307- 1987 is equivalent to ISO228/ 1. 60 taper pipe thread GB/T/KOOC-0/27/KOOC-0/6-/KOOC-0/99/KOOC-0/metric taper thread GB/T/KOOC-0/4/KOOC-0/5-/KOOC-0/992 General thread size series GB for pipe screwing end. T8335- 1998 General thread terminology GB/T14791-1993 is equivalent to ISO5408.