Usage: 2 forms in 7 verses
Form Translated As     In Verse(s)
κλείθρου bolt LXX.Song.5.5
κλείθρα And bolts LXX.Job.26.13
bolts LXX.Job.38.10
its bolts LXX.Neh.3.3LXX.Neh.3.6LXX.Neh.3.13LXX.Neh.3.14

Liddell-Scott-Jones

κλεῖθρον (kleithron) a bolt G:N-N

κλεῖθρον-ον,

Ionic dialect κλήϊθρον, Attic dialect κλῇθρον, Doric dialect κλᾷθρον (see.below), τό, κλείω A) bar for closing a door, in plural, κλῄθρων λυθέντων [Refs 5th c.BC+]; κλῇθρα πύλης, δόμων, [κλεῖθρονα 5th-6th c.BC: Xenophon Historicus “Anabasis” 7.1.17; σιδηρᾶ κ. 5th-6th c.BC: Plato Philosophus “Axiochus” 371b; \_sing.\_, ἀμφιδέαι.. ἀπὸ κλείθρου “IG” 22.1627.319. ">Refs 5th c.BC+]

__2 boom of a harbour, τοῦ λιμένος τὸ κ. [Refs 4th c.BC+]
__3 ἐπὶ θάμνοις καὶ κλείθροις fences, railings, [Refs 2nd c.AD+]
__II ={κλειθρία}, μεγάροιο διὰ κλήϊθρον ἔδυνεν [Refs]
__II.2 metaphorically, οἱ τὰ κ. ἔχοντες (i.e. τῆς Πελοποννήσου), of the Corinthians, [Refs 1st c.BC+]
__II.3 entrance of the windpipe, [Refs 5th c.BC+]
__II.4 as place-name, ἐν τοῖς Κλᾴθροις[Refs]