This is a A-405 Spark Plug (Autolite) PN: 405Main Description As Following : A-405 Spark Plug (Autolite) P.N: 405 Dim A (1): Autolite 405Dim B (2): 14mm ThreadDim C (3): 3/4" ReachDim D (4): 13/16" Hex ShoulderReplaces: C3PF12405AB Stocked As: A-21A866 , Crosses To: A-AF820M BIG A , A-B1SB405 ROTARY , A-LF3632 CROSLAND , A-LF3632J CROSLAND , A-LF571 HASTINGS , A-LF571J HASTINGS , A-21A866 , Found in Section & Models : Ignition & Electrical Parts > Ignition & Related Parts, Ford / New Holland TRACTOR: 2000 (SERIES), Ford / New Holland TRACTOR: 3000 (SERIES), Ford / New Holland TRACTOR: 4000 (SERIES), Ford / New Holland TRACTOR: 5000 (SERIES), Ford / New Holland TRACTOR: 7000 (SERIES) Associated Items : New Also A-DA-P-ALDR, A-FO-O-2-5000, A-FO-O-2000, A-FO-O-24000IND, A-FO-O-24000RC, A-FO-P-ACCESS, A-FO-P-SHERF9BH, A-FO-P-234000, A-FO-P-4CYLALL, A-FO-S-DATA, A-FO-S-ENG158, A-FO-S-SELECTO, A-FO-S-2000, A-FO-S-600700, A-MNL18259, A-SMFO20, A-SMFO201, A-SMFO31, A-FO-O-2-5000, A-FO-O-2000 And : Dim A (1): Autolite 405 Dim B (2): 14mm Thread Dim C (3): 3/4" Reach Dim D (4): 13/16" Hex Shoulder Replaces: C3PF12405AB