1/4" PILOT CONVERSION KIT. SPECIAL COMPRESSION NUT & FERRULE. CONVERTS 1/4" PILOTS TO 3/16" TUBING. USED FOR SERIES 1830 PILOTS. CONSISTS OF: 3/16" PILOT FERRULE, WHICH IS EXTRA LONG, # 40-047, AND PILOT NUT HAS THREADING TO FIT 1/4" PILOTS AND HAS 3/16" HOLE, # 10-218.