Back Home / Fasteners / Threaded Inserts / FLATHEAD THREADED NUT UNC ALUM 5/16″-18 GRIP .030 – .0125 FLATHEAD THREADED NUT UNC ALUM 5/16″-18 GRIP .030 – .0125 SKU: FTNA5618 Categories: Fasteners, Threaded Inserts Aluminum Flat Head rivet nuts. Are designed to provide a very efficient and cost-effective method of placing permanent threads in thin materials. Perfect for use in metals, fiberglass, and rigid plastics. Provide a neat appearance. Provide permanent, captive threads after installation. Flat Head design provides the most bearing surface for higher torque applications. Hole size: .413 min .423 max Case Quantity: 25 Log In For Pricing