2100X
Hex Spacer, With Undercut, Brass 2.0401, Surface Nickel Plated (G3E), 4-40 UNC, M3, AF (SW) 5, Lengths 5.0 and 6.0mm.
All UNC types are also available in steel, various lengths and with threads 2-56 UNC, 6-32 UNC and 8-32 UNC. Optional without undercut and surcharge.
