Orifice, Hood 3/4" Length x 3/8"-27 Threads Drill Size #53 , NRE # 130058-53
Orifice, Hood 3/4" Length x 3/8"-27 Threads Drill Size #54 NRE # 130058-54
Orifice, Hood 3/4" Length x 3/8"-27 Threads Drill Size #55 NRE # 130058-55