Sex bolt
type of fastener nut or bolt that is internally threaded
A sex bolt is a type of fastener comprising a mated pair of screw and post, which are a machine screw and a nut that is barrel-shaped. The nut has a flange and a protruding boss that is internally threaded. The bolt (mated pair, screw and post) sits within the components being fastened, and the flange provides the bearing surface.
A sex bolt is normally chosen because of the low profile of its nut compared with that of other nuts. The sex bolt often has a built-in feature, such as a slot, to aid in tightening the fastener. Some sex bolts, more commonly known as "architectural bolts", have knurled barrels to allow one-sided assembly.
The sex bolt consists of a female (internally) threaded barrel (nut) and a male (externally) threaded screw. Both the barrel and screw have heads designed to clamp (bind) material between the head of the barrel and the head of the screw, or to bridge the gap between two parts.
Other names for sex bolts, or (in some cases) for the female half specifically, include:
architectural bolts,
barrel bolts,
barrel nuts,
binding barrels,
book screws or book binding screws,
Chicago screws, or Chicago binding screws and posts,
connector bolts,
female screws,
posts and screws, screws and posts, or screw-in-post fasteners,
sleeve nuts
splint screws.
Applications vary widely from book binding to installing bathroom partitions.
This brief starts where responsible research should: with the source description of “Sex bolt” as type of fastener nut or bolt that is internally threaded. Everything that follows is an evidence route, not borrowed authority.
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The subject matters to the general reference register because the source frames it as type of fastener nut or bolt that is internally threaded. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Mar 13, 2025. The linked authority identifier is Q998773. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Sex bolt” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.