Kelko Products Company Share: Manufacture Manufacturing Kelko Products Company Visit Website 2110 George St. Sandusky, OH 44870 (419) 626-2571 (800) 346-7883 (419) 626-3115 (fax) www.kelkoproducts.com About Map About We're a family owned business now operated by the third generation of the Koch Family. Together, the three brothers represent over 75 years of combined experience in the stud bolt business. What's Nearby? Distance: 5 10 15 20 25 50 mi.