Unistrut Channel nut with spring, features steel construction with electro-galvanized finish for added corrosion and longer endurance. It has thread size of 3/8 - 16. This 3/8-Inch nut is suitable for use with P1000, P1100, P2000 and P3000 channel. Machine operated nut is case-hardened while ensuring positive biting action into the inturned edge of the Unistrut channel. Channel meets ASTM A576 GR 1015 modified and A1011 SS GR 45 standards.