... , L, N, P, Q) / 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 ... using the other pre-drilling tools. Most screws are available with painted heads, protective coatings and bonded neoprene washers to order ...