Lathrop's Locally-Owned Automobile And Tractor Parts Store. Clinton County Auto Parts is a locally-owned auto, truck and tractor parts store. We provide 24-Hour On Call Service. Gary Browning, Owner-Operator encourage you to come in and let us supply your auto and tractor parts. Our services include (but not all inclusive of stocked items): • Tractor Parts • High Performance Auto and Truck Parts (Foreign and Domestic) • Manufacturer of Hydraulic Hoses • Military and Volume Discounts Call or email for additional information.