... Name:NANOR. Zinc plating or phosphated: white/yellow/balk/grey Self Drilling Screws DIN7504 (K, L, N, P, Q) ... / ASME B18.6.4 & SAE J78 specifications Self-drilling fasteners for attaSelf Drilling ScrewsDIN7504 (K, L, N, ... Torx, Hex undercut, Square Diameter: #4 - #14 Length: 3/8" - 5"Features: Thread & Point Type: Type BSD, Type CSD, ... ) Zinc plated 3 - 5 my or 5 - 8 my. self drilling screw.