The moshav was established in 1955 on land that had belonged to the depopulated
Palestinian village of
Umm Burj. Although the village collapsed in 1968, it was re-established in 1981. Its name is derived from the name of the Biblical town of Ir-Nachash (1 Chronicles 4:12) nearby and from
Psalms 18:35 (where it is translated as brass, although its meaning is steadfast or firm); Who traineth my hands for war, so that mine arms do bend a bow of
brass. ==Archaeology==