JLG Parts Screw for use on JLG Boom MEWP(Mobile Elevated Work Platform) and select Telehandler (Rough Terrain Forklift) Machines. These Screws (Deutz Bolt Part# 02109988) are use to hold the Flywheel to the Crankshaft of Deutz Engines. Model Use: 400 Series, 500 Series, 600 Series, 800 Series Boom Lift and 2505H, 3614RS, 4017RS, G5-18A Telehandler Machines. Please ensure proper model and serial range before parts purchase.