18mm Champion Spark Plug, 1/2″ Reach

#D21, 18mm Champion Spark Plug, 1/2″ Reach

Fits:

• Case: 200, 430, 431, 435, 440, 441, 445, 470, 530, 531, 535, 540, 541, 545, 570, 610, 730, 731, 732, 733, 734, 740, 741, 742, 743, 744, 770, 830, 831, 832, 833, 840, 841, 842, 843, 870, 910, 930, 970; (18mm heads) D, LA
• Caterpillar: (With Pony motor) D2, D4, D6, D7, D8, DW10, RD-4
• Cletrac: AG-6
• Cockshutt: 60HC, 60KD, 70HC, 70KD; (Co-Op) No. 1
• Farmall: A, AV, Super A, Super AV, B, BN, C, Super C, Cub, H, HV, Super H, Super HV, M, MV, Super M, Super MV, O4, O6, OS4, OS6, W4, W6
• John Deere: 50, 60, 70 Gas, 520, 530, 620, 630, 720 Gas, 730 Gas; (With Pony Motor) R
• Oliver: 60, 66, 70, 77, 88