The standard specifies the testing requirements:
with a flange (also known as an embossed washer). These fasteners are designed to drill their own pilot hole, tap a thread, and fasten materials in a single operation, primarily for metal-to-metal or metal-to-wood applications. www.indexfix.com 1. Technical Specifications
Stop driving immediately once the washer sits flush against the material to avoid stripping the newly formed internal threads.
Equipped with a specialized self-drilling tip (drill point) that eliminates the need for pre-drilling or punching holes.
