Gas Orifice , 16-36 UNS Thread , .265" OD (6.74mm) Drill Size #55
NOTE: This Is A Special Thread

NRE # 130089-55

FITS VULCAN HART MODEL~

12 OPEN TOP, 148L, 148LC, 160L, 160LC, 24 GRIDDLE, 24L,
260L, 260LC, 260LCC, 36 GRIDDLE, 36L, 36LC, 481L, 481LC,
48L, 60L, 60LC, 60LCC, EG160, EG24, EG260, EG36, EG60,
GHIR44, IR1, IR2, IR2B, IR44, MG12, SAR34, SG44, SG4C, SG4D,
SG66, SG6C, SG6D, VG24, VG260, VG36, VG60