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2. List of screw drives - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_drives

   In Japan, the male sizes are often designated as DTC-20, DTC-27, DTC-40 (discontinued) and DTC-45 corresponding to a respective screw head size of 3.2 mm, 4.6 mm, 6.4 mm and 7.7 mm; with the size of the screw measured across the widest portion of the mating part of the head. The most common sizes in use for consumer electronics are DTC-20 and ...

3. Yankee screwdriver - Wikipedia

   en.wikipedia.org/wiki/Yankee_screwdriver

   Drill points for the smallest 133/135 size screwdriver; adapters to adapt push drill size drill point sets to the three sizes of screwdriver chuck size; countersinks; screwdriver tips holding with screw holding feature; Phillips screwdriver tips in various sizes (Ph#1 to Ph#3 in 5/16" and 9/32" shank models, Ph#1 and Ph#2 sizes only for the 7/ ...

4. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   The screw is fastened by hitting the head with a hammer and is not intended for removal. [2] drywall screw: Specialized screw with a bugle head that is designed to attach drywall to wood or metal studs, but it is a versatile construction fastener with many uses. The diameter of drywall screw threads is larger than the grip diameter. eye screw ...

5. Screwdriver - Wikipedia

   en.wikipedia.org/wiki/Screwdriver

   Phillips screw head. Meanwhile, in Portland, Oregon, Henry F. Phillips patented his own invention, an improved version of a deep socket with a cruciform slot, today known as the Phillips Screw. Phillips offered his screw to the American Screw Company, and after a successful trial on the 1936 Cadillac, it quickly swept through the American auto ...

6. File:Screw Head - Phillips.svg - Wikipedia

   en.wikipedia.org/wiki/File:Screw_Head_-_Phillips.svg

   Printable version; Page information; ... nominally 512 × 512 pixels, file size: 204 bytes) ... Diagram of a screw head - Phillips: Date: 14 July 2009: Source: Own work:

7. Robertson screw - Wikipedia

   en.wikipedia.org/wiki/Robertson_screw

   Many screws used in electrical applications (for example, a typical NEMA 5-15R, breaker screws, and conduit screws) use a combination of a slotted/Phillips/Robertson screw head. A few tool manufacturers make bits to engage this screw head better than the traditional Phillips allowing for more torque before camout, for example, the C1 and C2 ...