Etymology
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fastener (n.)
1755, "one who fastens," agent noun from fasten (v.). From 1792 of mechanical devices (for clothing, etc.).
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staple (v.)
late 14c., "to fix with a (large) staple," from staple (n.1). In the wire paper fastener sense, by 1898. Related: Stapled; stapling.
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zipper (n.)
1925, probably an agent noun from zip (v.1). The trademark taken out on the name that year applied to a boot with zippers, not to the "lightning fastener" itself, which was so called by 1927.
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clevis (n.)

"U-shaped iron bar with holes at the ends for a bolt or pin, used as a fastener," 1590s, of unknown origin; perhaps from a Scandinavian source akin to Old Norse klofi "a cleft," from Proto-Germanic *klub‑ "a splitting," from PIE root *gleubh- "to tear apart, cleave." Also uncertain is whether it is originally a plural or a singular.

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toggle (n.)
1769, "pin passed through the eye of a rope, strap, or bolt to hold it in place," a nautical word of uncertain origin, perhaps a frequentative form of tog "tug." As a kind of wall fastener it is recorded from 1934. Toggle bolt is from 1794; toggle switch, the up-and-down sort, first attested 1938. In computing by 1979, in reference to a key which alternates the function between on and off when struck.
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Velcro (n.)

1958, proprietary name (Britain), from French vel(ours) cro(ché) "hooked velvet."

Here is a nonmetallic fastener with no mechanical parts. It is simply two strips of nylon, one woven with thousands of tiny protruding hooks, the other with loops. Pressed together, they catch like a burr to clothing, can't be parted except by peeling. American Velcro, Manchester, N.H., makes them to hold anything from pants to upholstery. [Popular Science, December 1958]
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clavicle (n.)

"collarbone," 1610s, from French clavicule "collarbone" (16c.), also "small key," from Medieval Latin clavicula "collarbone" (used c. 980 in a translation of Avicenna), special use of classical Latin clavicula, literally "small key, bolt," diminutive of clavis "key" (from PIE root *klau- "hook"); in the anatomical sense a loan-translation of Greek kleis "key, collarbone," which is from the same PIE source. So called supposedly from its function as the "fastener" of the shoulder. Related: Clavicular.

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tassel (n.)
c. 1300, "mantle fastener," from Old French tassel "tassel, fringe, hem; a fastening, clasp" (12c., Modern French tasseau), from Vulgar Latin *tassellus, said to be from Latin taxillus "small die or cube," a diminutive of talus "knucklebone (used as a die in gaming), ankle" (see talus (n.1)). But OED finds this doubtful and calls attention to the variant form tossel and suggests association with toss (v.). Meaning "hanging bunch of small cords" is first recorded late 14c.
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tack (n.1)
"clasp, hook, fastener," also "a nail" of some kind, c. 1400, from Old North French taque "nail, pin, peg" (Old French tache, 12c., "nail, spike, tack; pin brooch"), probably from a Germanic source (compare Middle Dutch tacke "twig, spike," Frisian tak "a tine, prong, twig, branch," Low German takk "tine, pointed thing," German Zacken "sharp point, tooth, prong"), from Proto-Germanic *tag-. Meaning "small, sharp nail with a flat head" is attested from mid-15c. The meaning "rope to hold the corner of a sail in place" is first recorded late 15c.
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snap (n.)
late 15c., "quick, sudden bite or cut," from Dutch or Low German snappen "to snap," probably related to Middle Low German or Middle Dutch snavel "bill, beak," from West Germanic *snu-, an imitative root forming words having to do with the nose (see snout).

As an adjective from 1790. Commonly used to indicate instantaneous action, as in snap judgment (1841). Sense of "quick movement" is first recorded 1630s; that of "something easily done" is 1877. Meaning "brief or sudden spell" of weather (usually cold) is from 1740. Meaning "catch or fastener that closes with a snapping sound" is from 1815. The card game name is attested from 1881, from a call used in the game. Meaning "a snap-shot" is from 1894. U.S. football sense is from 1912, earlier snap-back (1880), which also was a name for the center position. Snap, Crackle and Pop, cartoon characters associated with Kellogg breakfast cereal Rice Krispies, are from 1940.
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