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  2. List of drill and tap sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

    Schematic of a machine tap. Below is a comprehensive drill and tap size chart for all drills and taps, imperial and metric, up to 36.5 millimetres (1.44 in) in diameter.. In manufactured parts, holes with female screw threads are often needed; they accept male screws to facilitate the building and fastening of a finished assembly.

  3. National pipe thread - Wikipedia

    en.wikipedia.org/wiki/National_pipe_thread

    National Pipe Taper Fuel (NPTF, also called Dryseal American National Standard Taper Pipe Thread, defined by ASME B1.20.3) is designed to provide a more leak-free seal without the use of PTFE tape (often referred to by the popular brand name "Teflon") or another sealant compound.

  4. Buttress thread - Wikipedia

    en.wikipedia.org/wiki/Buttress_thread

    In oil field tubing, buttress thread is a pipe thread form designed to provide a tight hydraulic seal. The thread form is similar to that of Acme thread [10] but there are two distinct threaded portions of differing diameters and profiles, the larger having a wedging profile, with a tapered sealing portion in between the larger and smaller diameters.

  5. 'Incredibly rare' copy of the U.S. Constitution found in home. North Carolina homeowners found the “incredibly rare” document inside an old filing cabinet when they were getting the house ...

  6. How many died in 9/11? A look at the tragic attack 23 years ago

    www.aol.com/many-died-9-11-look-193844783.html

    Thousands died in the Sept. 11, 2001 terrorist attack across New York, Washington, D.C. and Pennsylvania, and still many victims remain unidentified.

  7. AN thread - Wikipedia

    en.wikipedia.org/wiki/AN_thread

    For example, AN6 bolt has a 38-24 thread [3] whereas an -6 AN fitting has a 9 ⁄ 16-18 thread. [ 4 ] Originally parts were made compliant to the specification MIL-F-5509, but they are now controlled under SAE AS (Aerospace Standards) specifications AS4841 through AS4843 and AS4875.

  8. US job openings fall to 3-1/2-year low in July - AOL

    www.aol.com/news/us-job-openings-fall-3...

    U.S. job openings dropped to a 3-1/2-year low in July, suggesting the labor market was losing steam, but probably not enough for the Federal Reserve to consider a big interest rate cut this month.

  9. British Standard Cycle - Wikipedia

    en.wikipedia.org/wiki/British_Standard_Cycle

    British Standard Cycle (BSC or BSCy or CEI) is a British Imperial screw thread standard. Unlike other major British imperial thread standards (British Standard Whitworth and British Standard Fine) the thread runs at a 60 degrees rather than a 55 degrees angle. All sizes 4 inch and larger use 26 threads per inch (tpi), making them similar to 1 ...

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