This genuine Stanadyne OEM fuel return tee fitting is brand new and compatible with various John Deere engines, as well as equipment types including motor scrapers, telehandlers, combines, trenchers, skid steer loaders, forklifts, wood chippers, backhoe loaders, crawler dozers, skidders, tractors, motor graders, crawler loaders, and wheel loaders. It is also compatible with Oliver and Case equipment. This fuel return tee fitting is an NOS (new old stock) part that has never been used before and is in excellent condition. It can be easily installed to replace a damaged or worn-out fitting. Check your nut to make sure it is not damaged.