'Bolts' in the Bible

Now the sons of Hassenaah built the Fish Gate; they laid its beams and set up its doors with its bolts and its bars.

Joiada the son of Paseah and Meshullam the son of Besodeiah repaired the Old Gate. They laid its beams and set up its doors with its bolts and its bars.

Hanun and the inhabitants of Zanoah repaired the Valley Gate. They built it and set up its doors with its bolts and its bars, and repaired a thousand cubits (1,500 ft.) of the wall as far as the Refuse Gate.

Malchijah the son of Rechab, the official of the district of Beth-haccherem repaired the Refuse Gate. He rebuilt it and set its doors with its bolts and its bars.

Shallum the son of Col-hozeh, official of the district of Mizpah repaired the Fountain Gate. He rebuilt it and covered it [with a roof], and set up its doors with its bolts and its bars, and [he rebuilt] the wall of the Pool of Shelah (Siloam) by the King’s Garden as far as the stairs that descend [the eastern slope] from [the section of Jerusalem known as] the City of David.