7 Inch x 60 Inch Mixed Rock and Frost Chain Assembly (continued) Ref. 1 1:1 1:1:1 2 3 4 5 6 7 8 Part Number Qty. Description 131-6256 1 Chain Repair Link ASM 131-6257 2 Notched Pin And Keeper ASM 131-6258 1 Pin-Keeper 131-1372 9 Cutter-Cup, Mixed, LH 131-1373 9 Cutter-Cup, Mixed, RH 131-1377 10 Holder-Bit, RH 131-1378 9 Holder-Bit, LH 131-1440 38 Bit-Retainer, Rear 131-1374 6 Spacer-Flat 131-1405 48 Spacer-Tube, Outside Mount Ref. 9 10 11 12 13 14 15 16 17 3 Part Number Qty.