Threading Insert for Oil Pipe Threading Insert for Oil Pipe Helter Series API Round Inserts Parallelogram Series API Round Inserts Pitch Pitch Type Designation I.C H L B C d Y Picture Type Designation I. C H L B C d Y 0 Picture ( tpi ) ( tpi ) L R 8N R 1 . 4 S 1 5-Q 8 15.875 15.700 3.100 5.00 4 9° R8ER2.5P19 8 19.000 18.4 5.950 6.35 9.5 8 10 ° 8 0° R 1 0 E R 2 . 5 P1 9 10 19.000 18.4 5.950 6.35 9.5 8 10 ° 8 0° m x CD 3 Q) 3 R 1 0 N R1 . 5 S 1 5-Q 10 15.875 15.750 2.500 5.00 4 9° R 8 N R 2 . 5P1 9 8 19.000 18.4 5.950 6.35 9.5 8 10 ° 8 0° R 8 1 0 N R 2 . 5P1 9 8 19.000 18.4 5.950 6.35 9.5 8 10 ° 8 0° I T> CD 3 Q) c B I.C H 0 3 R 8 N R 1 . 7 S2 5 8 25.000 15.715 3.700 5.00 4 10 ° Q) 1 Prism Series API Round Inserts Pitch Type Designation A H L B a Picture ( tpi ) R 8E R 1 . 2L4 0 8 40.000 7.7 7.850 13.64 8° R 1 0 N R 1 . 8 S2 5 10 2 5 . 0 0 0 15.490 2.500 5.00 4 10 ° i R 1 0E R 1 . 2L4 0 10 40.000 7.7 7.200 12.92 8° m A X 0 3 a O 03 A Biforate SeriesAPI Round Inserts Pitch Type Designation A H L B C d E Picture ( tpi ) R 8 ER 2.3 D 24 8 24.000 12 10.340 6.4 15 4.70 R 10 ER 2.3 D 24 10 24.000 12 6.850 6.4 15 4.70 API Round Inserts for PMC Machine Tools ( USA ) m x 0 Pitch Type Designation ( tpi ) A H L B d a A Picture O) A R 8 E R 1 . 3 S 1 5 T- P 3 . 1 8 15.930 14.700 7.720 5.185 4° i p R 8 E R 1 . 3 S 1 5 T- P 3.2 8 15.930 1 4 . 7 0 0 6.670 5.185 4° i R 8 NR 2.4 D 24 8 24.000 12.4 10.340 6.4 15 4.70 m X R 8 E R 1 . 3 S 1 5 T- P 3 . 3 8 15.930 14.700 5.610 5.185 4° CD x o' =CD3 B A * Q 3 R 8 N R 1 . 7 S2 5-P 8 25.4 15.715 3.700 5.185 4 7°3 0 0 J 3 Q) R 8 NR 1.5 D 24 8 24.000 14.85 9.500 5 8 4.86 4 _L R 8 NR 1.7 D 24 8 24.000 14.85 3.400 5 8 4.86 4 CD 3 x CD R 10 NR 1.7 D 24 10 24.000 14.85 7.400 5 8 4.86 4 - B A C