(amda) New. PEM FH-0420-24ZI Self Clinching Studs, 1/4-20 Threads, 1 1/2" Long. These are zinc coated steel, 1/4=20 threads, 1 1/2" long, .062" minimum sheet thickness, and .312" minimum distance from edge to center line. Listing is for a lot of 50 pieces from the bulk packaging shown.