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2. List of screw drives - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_drives

   A square screw drive uses four-sided fastener heads which can be turned with an adjustable wrench, open-end wrench, or 8- or 12-point [67] sockets. Common in the 19th and early 20th centuries, when it was easier and cheaper to manufacture than most other drives, it is less common today (although still easy to find) because the external hex is ...

3. Tap and die - Wikipedia

   en.wikipedia.org/wiki/Tap_and_die

   An adjustable die may be adjusted either by an integrated screw or by a set of screws set in to the die holder (termed a "die stock"). Integral adjusting screws may be arranged to work axially, where the movement of the adjusting screw into a threaded hole in the die forces the slit section of the die open, or tangentially where a screw ...

4. Remove Stubborn Nuts and Bolts With These Editor-Approved ...

   www.aol.com/lifestyle/best-adjustable-wrenches...

   This versatile tool does the job of an entire set of fixed wrenches. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Sign in ...

5. United States Standard thread - Wikipedia

   en.wikipedia.org/wiki/United_States_Standard_thread

   United States Standard thread (USS thread), also known as Sellers Standard thread, [1] Franklin Institute thread [1] and American Standard thread, [2] is a standard for inch based threaded fasteners and washers. [3] The USS standard is no longer supported. It, together with the SAE fastener standard, was incorporated into the Unified Thread ...

6. Jig borer - Wikipedia

   en.wikipedia.org/wiki/Jig_borer

   A typical jig borer has a work table of around 400 by 200 millimetres (15.7 in × 7.9 in) which can be moved using large handwheels (with micrometer-style readouts and verniers) on particularly carefully made shafts with a strong degree of gearing; this allows positions to be set on the two axes to an accuracy of 0.0001 inches (2.5 μm). It is ...

7. Cox model engine - Wikipedia

   en.wikipedia.org/wiki/Cox_model_engine

   The power improvement was negligible so Cox reverted to the cheaper easier to build Babe Bee. The engine was made for quite a few years and sold for $6.95. A left and right hand rotary valve were made, as were left hand 6×2 glass-filled nylon props for the RR-1. Some versions have a blue tank, others have a clear anodized tank.