Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 132,942 pages of information and 210,197 images on early companies, their products and the people who designed and built them.
of Manor Works, Sheffield. Telephone: Sheffield 20512. Cables: "Steadfast". (1929)
Ditto Address. Telephone: Sheffield 22283. Cables: "Steadfast, Sheffield". (1947)
Founded by John Arthur Stead possibly known as 'Jack'
formerly John A. Stead
1919 Advert for 'Songster Needles' - no address.
1919 J. Stead & Co. wire manufacturers, hackle and gill pin manufacturers, Manor Works, Cricket Inn Road
1929 Listed Exhibitor - British Industries Fair. Manufacturers of Gramophone Needles, Mainsprings, Governor Springs and Sound Boxes. (Stand No. MM.20) 
1947 British Industries Fair Advert for: "Songster" Gramophone Products (Needles and Soundboxes); "Vulcan" Mainsprings for Clocks and Gramophones; Industrial Springs; Industrial and Textile Pins; "Stead" Screwdrivers; High Speed and Carbon Steel Drill Bars. Also as Specialists in Meter and Clock Spindles, etc. (Music and Radio Section - Olympia, Ground Floor, Stand Np. C. 1546) 
c1849 Commenced making tools - see advert
c1960 Added 'Darwin Tools Division' to the name.
1966 Patent - Improvements in or relating to screwdrivers. 
1967 Patent - Improvements in or relating to sliding-blade knife tools. 
c1983/4 Went into liquidation and was bought by Richard H. Green.
Became Steadfast Tools.