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An advertisement for Allen safety screws would appear in the 1910 Annual Convention of International Association of Factory Inspectors. [6] In 1922, Allen Manufacturing Company produced sets of tools under the company name "Bay State", suggesting that they may have privately acquired another hardware manufacturer, namely the Bay State Pump Company.
Standard 12-point hex socket bits and wrenches fit these screws. The screw heads are typically flanged, and may fit into standard Allen hex socket cap screw counterbores molded or machined into parts to be fastened. Compared to Allen hex sockets, the advantages of these bolts include higher torque capability and the lack of a recess to trap water.
A hex key (also, hex wrench, Allen key and Allen wrench, Unbrako or Inbus) is a simple driver for bolts or screws that have heads with internal hexagonal recesses ().. Hex keys are formed from a single piece of hard hexagonal steel rod, having blunt ends that fit snugly into similarly shaped screw sockets.
The company was one of the first to offer mass-produced drop-forged hand tools. [3] A second factory was opened in Buffalo, New York in 1914, now the site of General Motors' Tonawanda Engine plant. [4] The company was acquired by Snap-on in 1993. [citation needed] In 2011 it was officially renamed Snap-on Industrial Brands. [5]
Taps and dies are tools used to create screw threads, which is called threading. Many are cutting tools; others are forming tools. A tap is used to cut or form the female portion of the mating pair (e.g. a nut). A die is used to cut or form the male portion of the mating pair (e.g. a bolt).
The Allen Scythe, sometimes called the Allen Power Scythe, is a petrol-powered finger-bar mower. It was made from 1933 until 1973 by John Allen and Sons in Cowley, Oxfordshire . The company, formerly the Eddison and Nodding Company, was bought in 1897 by John Allen, who renamed it the Oxford Steam Plough Company, and then renamed it to John ...
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