Brand New Lug Surplus Caterpillar part number 7J7778 This lug is for ROPS on these machines. Off-highway Trucks: 772B (64W), 773B (63W), 775B (7XJ), 784B (5RK), 784C (2PZ), 785 (8GB, M85, SMT, W5D), 785B (6HK), 785C (1HW, 5AZ, APX), 785D (DMC, MSY, ZSP), 789 (9ZC, M89, NJR, WLP), 789B (7EK), 789C (2BW), 789D (AX7, SHH, SPD, XDT) Track-type Skidders: D4HTSK II (8ZF), D4HTSK III (7PK), D5HTSK II (7EG) Track-type Tractors / Bulldozers: 7A (4EB), 7S (6JB, 6KB, 8GH, 8NH, 8RH), 7S LGP (8JH), 7SU (4DB, 8EH, 8LH), 7U (5SB, 8MH), D6E (2MJ), D6F SR (5FR), D6G SR (3SR), D6G2 LGP (C6X, P6X), D6G2 XL (C6G, P6G), D7H (2RG, 3XG, 4FG, 5BF), D8 GC (KGX), D8GC (M8D), D8R (7XM, 9EM, MEJ, RJM), D9R (7TL, 8BL), D10R (AKT), D10T (RJG), D11R (AAF, 7PZ, 8ZR, 9TR, 9XR) Rippers: 7 (2KH, 5HC) Winches: 57H (1MK, 9EB) Wheel Tractor-Scrapers: 621 (37G), 631E (1BB, 6PC), 637E (1HB)