Yorkshire and the Humber
Stainless steel was invented in 1913 by Harry Brearley of Sheffield, working for Firth Brown Steels (now called Sheffield Forgemasters). SAE 304 stainless steel is the most common stainless steel today, invented by Dr William Herbert Hatfield FRS in 1924 at Firth-Vickers known as Staybrite 18/8, a chromium-nickel steel. Many Swiss watches were mostly made out of Staybrite.
Speed nut
The speed nut was invented in 1936 by Albert H. Tinnerman, son of George Tinnerman, who founded Tinnerman Steel Range Company. 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).