Troy Bilt Threaded Knob part# 1908591
These new knobs have a 5/16-18 thread insert in it so that it will thread onto the end of a bolt. It will fit Troy-Bilt Chipper Vac Model #'s 47278, 47280, 47282, 47283, 47279, 47286, 47287, could fit other things but your owners manual should be providing the correct part number for your equipment.