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UNS threads are rarely used for bolts, but rather on nuts, tapped holes, and threaded ODs. Because of this UNS taps are readily available. [ 6 ] [ 7 ] Most UNS threads have more threads per inch than the correlating UNF or UNEF standard; therefore they are often the strongest thread available. [ 8 ]
The Unified Numbering System for Metals and Alloys (UNS) is an alloy designation system widely accepted in North America. Each UNS number relates to a specific metal or alloy and defines its specific chemical composition, or in some cases a specific mechanical or physical property. A UNS number alone does not constitute a full material ...
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.
Unified Fine (UNF), the successor to the obsolete National Fine (NF) thread. Unified Extra Fine (UNEF) Unified Special (UNS) National pipe thread, used in North America for several purposes. National Pipe Taper (NPT) National Pipe Taper Fuel (NPTF), also known as Dryseal, a better sealing version of NPT. National Pipe Taper Railing fittings (NPTR)
UNS: Unified National Special; unified numbering system: Unified National Special is a subset series of the Unified Thread Standard. It is an extensible series, covering various special threads. The unified numbering system is a vaguely named standard for naming alloys by principal element percentages. UON: unless otherwise noted
A screw thread, often shortened to thread, is a helical structure used to convert between rotational and linear movement or force. A screw thread is an inclined plane wrapped around a cylinder or cone in the form of a helix, with the former being called a straight thread and the latter called a tapered thread.
6061 aluminium alloy (Unified Numbering System (UNS) designation A96061) is a precipitation-hardened aluminium alloy, containing magnesium and silicon as its major alloying elements. Originally called "Alloy 61S", it was developed in 1935. [2]
Sorry about that, DaveFoc is quite right, I misspoke; you wrote UNS but I read UTS and thought you were referring to the standard as a whole. Generally UNS threads are only used for "special" applications where one of the other threads won't work. One of the most common applications of a UNS thread that I have dealt with is with spindle threads.