(amda) New. Qty (100) PEM FH-0420-8ZI Self Clinching Threaded Studs, 1/4-20 Threads. Specifications include: .500" length, .249" diameter hole, .062" minimum sheet thickness, and .312" minimum distance from center line to edge. Listing is for a lot of 100 pieces from the bulk package shown. Feel free to inquire about different quantities.