Aftermarket Spark Plug

Fits Allis Chalmers:
Replaces Part Number(s): AL405

Fits Ford/New Holland:
Tractor Models: 2000, 2100, 2110LCG, 2120, 2300, 2310, 230A, 231, 234, 2600, 2610, 3000, 3120, 3190, 3330, 334, 335, 340, 3400, 340A, 3500, 3550, 3600, 3610, 3910, 4000, 4100, 4110, 4110LCG, 4140, 4190, 4200, 420, 4340, 4400, 4410, 4445, 4500, 4600, 4610, 5000, 5100, 5190, 515, 5200, 530A, 531, 5340, 535, 540, 540A, 545, 5500, 550, 555, 5600, 6600
Model Breaks: 2000 (3-Cylinder Engine, 0.025″ Plug Gap, 1965 – 1982), 2100 (3-Cylinder Engine, 1965 – 1982), 2600 (0.025″ Plug Gap, 1965 – 1982), 2610 (0.025″ Plug Gap, 1965 – 1982), 3000 (0.025″ Plug Gap, 1965 – 1982), 3600 (0.025″ Plug Gap, 1965 – 1982), 3610 (0.025″ Plug Gap, 1965 – 1982), 4000 (3-Cylinder, 0.025″ Plug Gap, 1965 – 1982), 4100 (3-Cylinder Engine, 1965 – 1982), 4600 (0.025″ Plug Gap, 1965 – 1982), 4610 (0.025″ Plug Gap, 1965 – 1982), 5000 (0.025″ Plug Gap, 1965 – 1982)
Replaces Part Number(s): AL405, N8, N6C, N21, C3PF12405AB, RN79G, 405, N6, AT21177