Peter, Would a #12 2" self-driller with a carbon steel shank and stainless steel hex head with attached washer do?
I use the T-5 Scots screws that I get from Dynamic Fasteners. I use them to attach ProSolar al. mounting rails directly through roof metal and into a 14g or 16g z-bar purlin. (I use a 1/4"-thick hypalon rubber pad to separate the rail from direct contact with the roof.) Marco ProVision Does anyone have a source for stainless steel, self tapping Tek screws? I could use some #10/3-4 and #10/1-1/2. If they have the little cap and neoprene washer that would be even better! - Peter Peter T. Parrish, President California Solar Engineering, Inc. 820 Cynthia Ave., Los Angeles, CA 90065 Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885 CA Lic. 854779, NABCEP Cert. 031806-26 peter.parr...@calsolareng.com _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org