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2. British Standard Whitworth - Wikipedia

   en.wikipedia.org/wiki/British_Standard_Whitworth

   British Standard Whitworth. British Standard Whitworth ( BSW) is an imperial-unit -based screw thread standard, devised and specified by Joseph Whitworth in 1841 and later adopted as a British Standard. It was the world's first national screw thread standard, and is the basis for many other standards, such as BSF, BSP, BSCon, and BSCopper .

3. M1156 Precision Guidance Kit - Wikipedia

   en.wikipedia.org/wiki/M1156_Precision_Guidance_Kit

   The M1156 Precision Guidance Kit (PGK), formerly XM1156, is a U.S. Army -designed precision guidance system to turn existing 155 mm artillery shells into smart weapons. [ 2] The prime contractor was Alliant Techsystems – later merging with Orbital Sciences Corporation to form Orbital ATK, in turn being taken over by Northrop Grumman and ...

4. List of screw drives - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_drives

   Double hex is a screw drive with a socket shaped as two coaxial offset hex recesses; it can be driven by standard hex key tools. The shape resembles triple square and spline screw drives, but they are incompatible. The radial "height" of each arris is reduced, compared to a six-point, although their number is doubled.

5. Socket wrench - Wikipedia

   en.wikipedia.org/wiki/Socket_wrench

   Socket wrench. A socket wrench (or socket spanner) is a type of spanner (or wrench [ 1] in North American English) that uses a closed socket format, rather than a typical open wrench/spanner to turn a fastener, typically in the form of a nut or bolt. [ 2] The most prevalent form is the ratcheting socket wrench, often informally called a ratchet.

6. Proto (tools) - Wikipedia

   en.wikipedia.org/wiki/Proto_(tools)

   Products. Industrial tools. Parent. Stanley Black & Decker. Website. protoindustrial.com. Proto Tools (formally Stanley Proto) is an American industrial hand tool company. Founded as Plomb, it is presently a division of Stanley Black & Decker. The company is credited with creating the first combination wrench in 1933.

7. Craftsman (tools) - Wikipedia

   en.wikipedia.org/wiki/Craftsman_(tools)

   Craftsman is a line of tools, lawn and garden equipment, and work wear. Originally a house brand established by Sears, the brand is now owned by Stanley Black & Decker . As with all Sears products, Craftsman tools were not manufactured by Sears during that company's ownership, but made under contract by various other companies.