6cor 3/8" Unistrut Spring Nut for 1-5/8"W Strut Channels up to 1-5/8" Deep Contractor Pack 100ct Genuine 6cor Brand Use With 1-5/8" Wide and up to 1-5/8" Deep Strut Channel Channel Nut With Spring Hot-Dipped Galvanized Finish 3/8"-16 Thread Size