Threading Insert for Oil Pipe Threading Insert for Oil Pipe Helter Series API Buttress Inserts Parallelogram SeriesAPI Buttress Inserts Pitch Pitch Type Designation A H L B d a Picture Type Designation I. C H L B C d Y 0 Picture ( tpi ) ( tpi ) B4NR 1.1 S 15 4 15.760 15.530 11.470 4.76 4 12 ° B 5 ER 2.3 P 19 5 19.000 18.9 5.950 6.35 9.5 8 10 ° 80 ° i. m X CD 3 CD B 5 NR 1.2 S 15 5 15.875 15.750 7.650 5 4 8 ° 30 ' B 5 NR 1.2 S 15 - G 5 15.875 15.250 7.680 4.9 4 9° _ V T\ B 5 NR 2.3 P 1 9 5 19.000 18.9 5.950 6.35 9.5 8 10 ° 80 ° => o =CD3 A B 5 NR 1.2 S 15 -T 5 15.875 15.750 7.700 5.00 4 9° L B 5 NR 1.2 S 15 -TX 5 15.875 15.750 7.350 5.00 4 9° Triangle Series API Buttress Inserts ( On - edge Type ) 3 A Pitch 0 Type Designation I. C H L B d a Picture B 5 NR 1.1 S 15 - CB 5 15.875 15.750 12.500 5.00 4 8 ° 30 ' ( tpi ) Q) B 5 NR 1.1 S 15 - CB 2 5 15.875 15.750 12.500 5.00 4 8 ° 30 ' VB 5 ER 3.1 T 16 5 16.000 26.2 2.760 6.45 6.4 9° VB 5 EL 3.1 T 16 5 16.000 26.2 2.760 6.45 6.4 9° i m X CD CD A L B 6 NR 1.1 S 16 6 16.000 15.740 12.500 5.00 4 8 ° 30 ' a B 6 NR 1.1 S 16 - H 6 6 16.000 15.750 13.200 5.00 4 10 ° 17 VB 5 NR 3.1 T 16 5 16.000 26.2 2.760 6.45 6.4 9° B 8 NR 1.1 S 15 - TB 8 15.875 15.940 13.625 5.00 4 8 ° 30 ' B 8 NR 1.1 S 16 - CBT 8 16.000 15.740 13.360 5.00 4 8 ° 30 ' X VB 5 NL 3.1 T 16 5 16.000 26.2 2.760 6.45 6.4 9° o 13 B 8 NR 1.1 S 16 - P 8 16.000 15.740 13.750 5.00 4 8 ° 30 ' CD X B A =CD3 B 5 NR 1.5 S 25 5 25.400 15.736 1.185 5.185 4 10 ° ' Biforate SeriesAPI Buttress Inserts A Pitch Type Designation A H L B C d a E Picture ( tpi ) API Buttress Inserts for PMC Machine Tools ( USA ) B 5 ER 2.2 D 24 5 24.000 12 15.760 6.5 15 4.70 = . - - B oi m Pitch X Type Designation A H L B d a Picture CD ( tpi ) CD I ’ ' B 5 ER 1.3 S 16 - P 3.1 5 16.900 14.600 4.370 5.185 10 ° L » -J A. B 5 ER 1.3 S 16 - P 3.2 5 16.900 14.860 2.630 5.185 10 ° m B 5 NR 2.2 D 24 5 24.000 12 15.760 6.5 15 4.70 X B 5 ER 1.3 S 16 -P 3.3 5 16.900 15.000 0.880 5.185 10 ° CD tSCi CD B 8 ER 1.3 S 15 - P 8 15.880 15.734 3.583 5.000 1 0° B 5 NR 1.5 S 25- P 5 25.400 15.600 1.700 5.185 9 ° 30 . CD m 3 CD B 5 NR 1.5 D 24 5 24.000 14.85 1.000 5 8 4 3° 4.86 =3 CD B 5 NL 1.5 D 24 5 24.000 14.85 3.600 5 8 4 3° 4.86 CD Si