Threading Insert for Oil Pipe Threading Insert for Oil Pipe Triangle Series API Round Inserts Helter Series API Buttress Inserts Type Designation Pitch(tpi) I.C H L B d a Picture Type Designation Pitch(tpi) A H L B d a Picture R8ER3.2T15 8 15.875 24.30 5.000 5.5 6.2 8° B5ER1.3S15 5 15.900 15.100 3.200 4.76 4 9° i R10ER3.2T15 10 15.875 24.50 4.700 5.5 6.2 8° B5ER1.3S15D 5 15.900 15.100 1.850 4.76 4 9° m X CD =5 03 B5ER1.1S15-CB 5 15.875 15.750 12.000 5 4 8°30 R8NR1.7S25-P 8 15.875 24.30 5.000 5.5 6.2 8° R8ER1.3S15T-P3.3 8 15.875 24.50 4.700 5.5 6.2 8° =3 CD Q) B5ER1.2S15-T 5 15.760 15.450 2.450 4.76 4 6° B6ER1.1S16 6 16.000 15.740 12.500 5 4 8°30 Helter Series API Buttress Inserts B6ER1.3S15-H16 6 15.875 15.700 2.470 5 4 10° m B8ER 1.3S15 8 15.875 15.734 3.583 5 4 10° x B8ER 1.3S 16-CBT 8 16.000 15.734 3.578 5 4 10° 0 3 Q) B5ER1.3S20-2.1 5 20.000 15.700 3.650 4.76 4 10°B5ER1.3S20-2.2520.00015.8801.0004.76410°m B5ER1.3S25-KX 5 25.400 15.730 1.100 5 4 8° t p > B5ER1.4S25 5 25.400 15.736 1.185 5 4 9° B5ER1.5S25 5 25.400 15.736 1.185 5 4 7° B5ER 1.5S25-KX 5 25.400 15.410 1.200 5 4 8° B5ER1.5S25-KX-2 5 25.000 15.880 1.200 5 4 8°