AC Industrial - Fits: Dozer: H4
Allis Chalmers - Fits: D17 (SN: 75001 and up), D19, 170, 180, 190 (0.025" plug gap ), 190XT
Autolite - Replaces: 405
Champion - Replaces: N21, N6, N6C, N8, RN6, RN79G
Cockshutt - Fits: [ Oliver Built Cockshutt Tractor: 1600, 1650, 1655, 1750, 1800, 1850 (GAS) ], 1855 (GAS, 0.020" plug gap )
Ford - Fits: [ 1965 - 1982: 2000 3 cylinder, 2600, 2610, 3000, 3600, 3610, 4000 3 cylinder, 4600, 4610, 5000 (0.025" plug gap ) ]
International / Farmall - Fits: 284 (0.020" plug gap )
Fits John Deere - 1020, 1520, 2020, 2030, 2510, 2520; Replaces: AT21177
MF Miscellaneous - Fits: MF Swather: MF Swather
Oliver - Fits: 1600, 1650, 1655 (LPG), 1800, 1850 (LPG, 0.020" plug gap )
Satoh - Fits: S550 Elk, S650 Bison
Note: Check spark plug specifications before ordering as some models may use more than one type.
M14-1.25mm thread
3/4" Thread reach
13/16" Hex
Preset Gap 0.033"
Medium hot
Standard tip / Resistor