ACS4274 Upper Seat Shock Bolt and Wing Nut Fits Allis ChalmersOne New Aftermarket Upper Seat Shock Bolt and Wing Nut Fits Allis Chalmers Models: D10, D12, D14, D15, D17, D19, D21, I40, I400, I60, I600, 170, 175, 180, 185, 190, 190XT, 200, 210, 220, 7000, 7010, 7020, 7030, 7040, 7045, 7050, 7060, 7080 Tech Info: Carriage Bolt, washer and Wing Nut. 6 3 16" thread length 1 2" 13UNC threads Can replace hex head bolt, not used on early D14's etc. Replaces Part Number(s): 921872, 921873, 924361