BOLT, tr. of the Heb. נָעַל, H5835, appears only in 2 Samuel 13:17, 18 in the KJV. It is tr. “lock” in other passages (Judg 3:23, et al.). The word has no other cognates in the Sem. languages except late Heb. and Syr. Although its primary meaning is associated with an identical root referring to leather or sandals, locks and bolts in antiquity were made of both wood and metal. These locks were usually fastened from within but some were designed for large elaborate keys. The “burning coals” (Hab 3:5 KJV) are more precisely “fiery bolts” as in ASV.