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  • Diamond K Supply
    Diamond K Supply
    (925) 284-4477
    3671 Mt Diablo Blvd, 94549  Lafayette

    Welcome to Diamond K Supply. As a family-owned business, we truly appreciate the loyalty of our customers and employees. With over fifty years of experience behind us, the Magrath family looks forward to serving our customers and community for years to come. Over the years, Diamond K has expanded …

  • Diamond K Supply Co
    Diamond K Supply Co
    (925) 284-4477
    3671 Mt. Diablo Blvd, 94549  Lafayette

    Welcome to Diamond K Supply. As a family-owned business, we truly appreciate the loyalty of our customers and employees. With over fifty years of experience behind us, the Magrath family looks forward to serving our customers and community for years to come. In 1936, Diamond K Supply Co. first open…