API - OIL THREADS EXTERNAL & INTERNAL - API V-TYPE (API SPEC 74-1994) Regular Type Application: Oil & Gas Indusrty *Right hand (external) shown TT7010 TT9030 Thread Insert IC TPI L Taper Connection Grade Designation Hand Type Type (inch) (inch) IPF Number 22ER5API403 External Right Regular 0.500 5 0.866 3.000 2-3/8" / 4-1/2" REG 27ER4API382 External Right Regular 0.625 4 1.063 2.000 NC23 / NC50 27ER4API383 External Right Regular 0.625 4 1.063 3.000 NC56 / NC77 27ER4API502 External Right Regular 0.625 4 1.063 2.000 6-5/8" REG 27ER4API503 External Right Regular 0.625 4 1.063 3.000 5-1/2" 7-5/8" 22IR5API403 Internal Right Regular 0.500 5 0.866 3.000 2-3/8" / 4-1/2" REG 27IR4API382 Internal Right Regular 0.625 4 1.063 2.000 NC23 / NC50 27IR4API383 Internal Right Regular 0.625 4 1.063 3.000 NC56 / NC77 27IR4API502 Internal Right Regular 0.625 4 1.063 2.000 6-5/8" REG 27IR4API503 Internal Right Regular 0.625 4 1.063 3.000 5-1/2" 7-5/8" =P =M =K =N =S =H 1238