Ugaritic

mṣbṭ - a smith’s tongs (DUL 585, Pardee 1997: 256)

A borrowing from Akk. naṣbatu (CAD N₂ 47) is, contra Watson 2007:95, quite improbable.

PS
*ṣ̂bṭ - to seize, take hold of, catch (HALOT 997; Kogan 2015: 221)