Located five kilometres north-east of Beit Guvrin, it falls under the jurisdiction of Mateh Yehuda Regional Council.

[1] The moshav was established in 1955 on land that had belonged to the depopulated Palestinian village of Umm Burj.

Its name is derived from the name of the Biblical town of Ir-Nachash (1 Chronicles 4:12)[3] 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.In 2004 an archaeological excavation was conducted at Nehusha by Rona Avissar on behalf of Bar Ilan University's Department of Land of Israel Studies and Archaeology.

[4] The excavation revealed about 30 entrances to rock-cut caves, 10 bell shaped caves with plastered walls, rock-cut tombs with kokhim, columbarium, agricultural facilities later to become an underground hiding complex and a stable.

Pottery fragments at the site dates back to the Hasmonean dynasty, Roman and Byzantine periods and very few from the medieval period.