Threading Applicable toolholders and inserts TPGB for internal threading In applicable toolholder / insert lists on J48- J51 right-hand insert / right-hand toolholder descriptions are listed based on the previous TNN type inserts. For other applicable inserts / toolholders or stock availability of left-hand, see each relevant page and page J54. Parallel pipe [G(PF), Rp(PS)] Nominal thread External thread (R)SymbolTPI(Previous symbol)ToolholderInsertPartial profileFull profileToolholderInternal thread (G, Rp)InsertPartial profileFull profileSame root’sBore dia.radius G ¹⁄16(-)G ¹⁄8(PF ¹⁄8) KTNR -1628KTNSR-16S-KTNL1616ERA55-TF/TQ16ERAG55-TF/TQ16ERA5516ERAG55 6.56-SINR0612S-06E06IR5501-0.128.57 G ¹⁄4(PF ¹⁄4)G ³⁄8(PF ³⁄8) KTNR -1619KTNSR-16S-KTNL1616ERA55-TF/TQ16ERAG55-TF/TQ16ERA5516ERAG5516ER19W-TF/TQ16ER19WSINR0816S-08E08IR5501SINR1216S-11E11IRA5511IR55005-11.45 0.18-14.95 G ¹⁄2 SINR1516S-11 11IR55005 - 18.63 (PF ¹⁄2) SINR1616S-16 G 5⁄8(PF 5⁄8)G ³⁄4(PF ³⁄4) KTNR -1614KTNSR-16S-KTNL1616ERAG55-TF/TQ16ERG55-TF/TQ16ERAG5516ERG5516ER14W-TF/TQ16ER14W 16IRAG55 20.59SINR2016S-1616IRG5516IR14W-TF/TQ0.2516IR550116IR14W24.1216IR5502 G 7⁄8(PF 7⁄8) SINR2420S-16 27.88 J G1 SINR2420S-16 30.29 (PF 1)G 1¹⁄8(PF 1¹⁄8)G 11⁄4(PF 11⁄4)KTNR -1611KTNSR-16S-KTNL1616ERAG55-TF/TQ16ERG55-TF/TQ16ERAG5516ERG5516ER11W-TF/TQ16ER11W 16IRAG55CINR3025S-1616IRG5516IR550116IR11W-TF/TQ16IR11W34.940.3216IR5502CINR3732S-1638.95 Hereafter, all the threads are 11 TPI and the root’s radius 0.32. The same tool for G11⁄4 is recommended. Tapered pipe [R Rc(PT)(BSPT)] Nominal thread External thread (G) Internal thread (Rc) Symbol TPI(Previous symbol)Toolholder InsertPartial profileFull profile Toolholder InsertPartial profileFull profile Same root’sradius R ¹⁄16, Rc ¹⁄16(-)R ¹⁄8, Rc ¹⁄8(PT ¹⁄8)KTNR -1628KTNSR-16S-KTNL16(16ERA55-TF/TQ)(16ERAG55-TF/TQ)(16ERA55)(16ERAG55)16ER28BSPT-TF/TQ16ER28BSPTSINR0612S-06E06IR5501- 0.12 R 1⁄4 Rc 1⁄4(PT 1⁄4)R ³⁄8, Rc ³⁄8(PT ³⁄8)KTNR -1619KTNSR-16S-KTNL16(16ERA55-TF/TQ)(16ERAG55-TF/TQ)(16ERA55)(16ERAG55)16ER19BSPT-TF/TQ16ER19BSPTSINR0816S-08E08IR5501-SINR1216S-11E(11IRA55)(11IR55005)11IR19BSPT-TF/TQ11IR19BSPT0.18 R ¹⁄2, Rc ¹⁄2(PT ¹⁄2)R ³⁄4, Rc ³⁄4(PT ³⁄4)KTNR -1614KTNSR-16S-KTNL16(16ERAG55-TF/TQ)(16ERG55-TF/TQ)(16ERAG55)(16ERG55)16ER14BSPT-TF/TQ16ER14BSPTSINR1516S-11(11IR55005)11IR14BSPT-TF/TQ11IR14BSPTSINR1616S-1616IR14BSPT-TF/TQSINR2016S-1616IR14BSPT0.25 R 1, Rc 1 (16IRAG55) (PT 1)R 1¹⁄4, Rc 1¹⁄4(PT 1¹⁄4)R 1¹⁄2, Rc 1¹⁄2 SINR2420S-16 (16IRG55)KTNR-1611KTNSR-16S-KTNL16(16ERAG55-TF/TQ)(16ERG55-TF/TQ)(16ERAG55)(16ERG55)16ER11BSPT-TF/TQ16ER11BSPT(16IR5501)CINR3025S-16(16IR5502)16IR11BSPT-TF/TQ16IR11BSPT0.32 (PT 1¹⁄2) CINR3732S-16 Hereafter, all the threads are 11 TPI and the root’s radius 0.32. Hereafter, all the threads are 11 TPI and the root’s radius 0.32. The same tool for R1½ is recommended. The same tool for Rc1½ is recommended. 1) The largest size of minimum diameter toolholder is recommended for Internal threading toolholders. Therefore it is available if minimum diameter is smaller than recommended toolholders. (e.g.) SINR2420S-16 (Min. Bore dia.: ø24mm) is recommended for the Tool of G7/8 Internal threading from the above Table, but SINR2016S-16 can also be used. 2) When using "Partial profile" for Tapered pipe threading, thread's corners become sharp edged, and the shape will not be the same as the standard shape for Tapered pipe. J48