N 4141 (OTTO) Nickel wire, 2.0 mm (0.08in) dia, 99.995% Cas 7440-02-0 - used to produce items for the aerospace, battery, and medical industries. N 4141 (OTTO) Nickel wire, 2.0 mm (0.08in) dia, 99.995% Cas 7440-02-0 - used in automotive screen and heating elements, lighting and lead wire.