• MEASURE 1/8″ – 2″ MALE NPT SIZES
  • MEASURE 1/8″ – 1 1/2″ FEMALE NPT SIZES
  • MEASURE 1/8″ – 1″  NYLON TUBING O.D. SIZES
  • MEASURE 1/4″ – 3/4″ NYLON TUBING I.D. SIZES
  • TUBE FITTING THREAD SIZE COMPARISON CHART
  • PIPE THREAD REFERENCE GUIDE FOR NPT, BSPT & BSPP FITTINGS
  • MADE IN THE USA!