... ) / ASME B18.6.4 & SAE J78 specifications Self-drilling fasteners for atta Self Drilling ScrewsDIN7504 (K, L, N, P, Q) / ASME ... B18.6.4 & SAE J78 specificationsSelf-drilling fasteners for attaching into metal, aluminium, or stainless steel. Drills ... easy operation. No more need for using the other pre-drilling tools. Most screws are available with painted heads, protective coatings ...