Nut (fruit) usage of the term is less restrictive, and many nuts (in the culinary sense), such as almonds, pecans, pistachios, walnuts, and Brazil nuts, are not nuts in a botanical sense. Common usage of the term often refers to any hard-walled, edible kernel as a nut. A nut in botany is a simple dry fruit in which the ovary wall becomes increasingly hard as it matures, and where the seed remains unattached or free within the ovary wall. Most nuts come from the pistils with "inferior" ovaries (see flower) and all are "indehiscent" (not opening at maturity). True nuts are produced,
Speed nut Albert H. Tinnerman, son of George Tinnerman (who founded Tinnerman Steel Range Company), in 1936. Tinnerman invented the nut to resolve issues with stove shipping. The invention was so successful it led the company away from building stoves to building fasteners. Tinnerman Products evolved from the speed nut development with manufacturing plants in Cleveland, Ohio. A modern manufacturing plant was constructed on Brookpark Road in the mid-1950s. Tinnerman Products was later acquired by Eaton Yale & Towne (Eaton Corporation). Speed nut A speed nut, aka sheet metal nut or Tinnerman nut, is a type of locknut with two sheet metal