What is "stud bolt"

Stud \Stud\, n. [AS. studu a post; akin to Sw. st["o]d a prop, Icel. sto? a post, sty?ja to prop, and probably ultimately to E. stand; cf. D. stut a prop, G. st["u]tze. See Stand.]

1. A stem; a trunk. [Obs.]

   Seest not this same hawthorn stud?
   --Spenser.

2. (Arch.) An upright scanting, esp. one of the small uprights in the framing for lath and plaster partitions, and furring, and upon which the laths are nailed.

3. A kind of nail with a large head, used chiefly for ornament; an ornamental knob; a boss.

   A belt of straw and ivy buds, With coral clasps and amber studs.
   --Marlowe.

   Crystal and myrrhine cups, embossed with gems And studs of pearl.
   --Milton.

4. An ornamental button of various forms, worn in a shirt front, collar, wristband, or the like, not sewed in place, but inserted through a buttonhole or eyelet, and transferable.

5. (Mach.)

   1. A short rod or pin, fixed in and projecting from something, and sometimes forming a journal.

   2. A stud bolt.

6. An iron brace across the shorter diameter of the link of a chain cable.

   Stud bolt, a bolt with threads on both ends, to be screwed permanently into a fixed part at one end and receive a nut upon the other; -- called also standing bolt.