Industrial Fasteners & Supplies It's about more than nuts and bolts - at KL Jack and Company, we take pride in providing our customers with the best service possible so they can get the highest-quality industrial supplies they need, when they need it. It all started in 1979 with the vision to stock the finest industrial nuts and bolts to our local Maine customers. Since then, we have grown at an annual rate of more than 25 percent with more than 40 knowledgeable employees in our 5 branches throughout New England.