#410 Stainless steel unslotted indented hex head, self Drilling, passivated & waxed screw w/bondedNEO-EPDM washer. Self-drilling screw drills a hole and taps a thread in a single operation. The drilling point must fully penetrate all pieces of material being fastened before the first thread engages.  The washer and hex head are formed together as one piece. When the screw is properly installed, the bonded washer will create a leek proof seal. Application: Attaches metal to metal. Drill Capacity (in.): .125 - .500 Installation: A 5/16” hex nut setter or 5/16” drive socket with torque limiting nose piece set at a maximum of 1500 RPM drive speed recommended. Do not over torque as it can cause the head to snap or stripping of the threads. Installed fasteners must penetrate a minimum of three full threads beyond the metal structure. Specifications: • Manufactured to SAE1 J78 for dimensional specifications • Meets F.I.P.2-1000.7 for torsional strength and drill speed • Medium degree of corrosion resistance