
30. List of Thread Standards and Nominal Diameter Ranges of Yamawa Taps Production data ■British※ Thread type Nominal Nominal diameter range of Yamawa taps Thread type Thread angle Standard Taper symbol diameter range JIS ANSI StandardsDIN Thread symbols Kinds of threads Related R, Rc JIS B 0203 1/16 〜 6 1/16 〜 2 - - Taper pipe thread 55° 1/16 PT JIS B 0203 Appendix 1/8 〜 12 1/16 〜 4 - - Thread for shutter cable release tip and socket for - 60° JIS B 7104 3.4 28° 3.4 - - camera (corresponding to R, Rc, Rp of ISO) Thread for seamless steel - 55° JIS B 8241 Appendix V1,V2,V3 - - - gas cylinder Thread for valve for - 55° JIS B 8244 Appendix 39 - - - dissolved acetylene cylinder 3/26 Thread for valve for liquefied - 55° JIS B 8245 Appendix V1,V2 - - - petroleum gas cylinder Thread for valve for high - 55° JIS B 8246 Appendix V1,V2,V3 - - - pressure gas cylinder Thread for artificial - 60° JIS R 7201 45 〜 406 1/3 - - - graphite electrode Taper thread ※ : We left out the symbols after ISO standard was adopted. American taper pipe thread For general use NPT ANSI/ASME 1/16 〜 24O.D. 1/16 〜 3 1/16 〜 2 - 60° 1/16 ■German※ For railing joint NPTR B1.20.1 1/2 〜 4 - - - American dryseal taper Thread symbols Kinds of threads Related Standards pipe thread For dryseal connection NPTF 60° ANSI B1.20.3 1/16 〜 3 1/16 1/16 〜 2 1/16 〜 2 - PTF-SAE SAE SHORT SHORT American taper pipe thread 1/16 〜 3 ANPT 60° SAE AS 71051B 1/16 - - - for aircraft API thread for steel pipe 1/8 〜 20O.D. LP 60° API Std 5B 1/16 - - - for oil well(USA) Thread for mining drill tube Gg 60° DIN 20314 31/4 〜 65/8 1/4 - - - (Germany) Thread for gas container tire 0.6 : 1/5.625 - - - - 55° BS 341:Part1,2 0.6 〜 1.25 valve(UK) 0.715 〜 1.25 : 1/8 - - - ※ : We left out the symbols after ISO standard was adopted. Information Technical Technical-97