Threading Inserts EXTREME LINE CASING API SPEC 5B : 2008EL NUT6°6° B A A B I.C. I.C. L L IPF EL SCREW INTERNAL EXTERNAL EXTERNAL PITCH TAPER CATALOG NUMBERTPIIPFRIGHT HAND SIZE DIMENSIONSLmmI.C.A B 6 1.5 EL615 ER22 5 "- 7 5/8" 2.0 1.9 22 12.70 5 1.25 EL5125 ER22 8 5/8" – 10 3/4" 2.3 2.4 INTERNAL PITCH TAPER CATALOG NUMBERTPIIPFRIGHT HAND SIZE DIMENSIONSLmmI.C.A B 6 1.5 EL615 IR22 5 "- 7 5/8" 2.0 1.9 5 1.25 EL5125 IR22 22 12.708 5/8" – 10 3/4"2.3 2.4 50