(a) n. a type of nail provided with a rove for clinching; (b) adj. (of a nail) provided with a rove for clinching; also of work using such nails.

A large make of nail, esp. used in shipbuilding. Also collective.

(see quot. 1850 and quot. 1867 at fill, v. 1d).

A screw (screw, n.1 4a) with an eyebolt at the head, used to temporarily secure parts of the hull of a wooden vessel to each other while under…

attributive (quasi-adj.) in various senses; spec. in-and-out bolts (see quot. 1850); in-and-out boy, in and out man, someone in and out of prison…

(See quot. 1852.)

a head of a rivet, bolt, screw, etc., shaped like an inverted flat-bottomed pan; frequently attributive.