Editing Unified Thread Standard (section)

==External links==
* [http://www.amesweb.info/Screws/AsmeUnifiedInchScrewThread.aspx Unified Screw Threads with Tolerances]
* [http://www.carbidedepot.com/formulas-tap-standard.htm Unified Coarse/Fine diameters and tap drill sizes] (U.S. units)
* [http://www.metal-mart.com/Guides/Tap_Drill_Sizes.aspx Unified Coarse/Fine tap drill sizes] (U.S. units)
* [http://www.baconsdozen.co.uk/tools/conversion%20charts.htm Imperial Metric fastening size conversion charts]
* [http://www.gewinde-normen.de/en/index.html International Thread Standards]
* [http://www.baconsdozen.co.uk/tools/spanners.htm#chart Conversion chart Whitworth/BSF/AF and metric] {{Webarchive|url=https://web.archive.org/web/20100502061908/http://www.baconsdozen.co.uk/tools/spanners.htm#chart |date=2 May 2010 }}
* [http://www.sat.dundee.ac.uk/~psc/spanner_jaw.html Spanner Jaw Sizes] Additional information and spanner jaw size table.
* [http://www.efunda.com/designstandards/screws/screwun.cfm Unified Screw Threads Series]
* [http://www.asme.org/products/codes---standards/unified-inch-screw-threads--un-and-unr-thread-form ASME B1.1-2003 Unified Inch Screw Threads, (UN and UNR Thread Form)]
* [https://www.threadspecification.com/un/ Unified Inch Screw Threads]

[[Category:Thread standards]]
[[Category:Screws]]
[[Category:Standards of the United States]]