Hello Thomas, In the past I have used ref des "M" to designate mounting holes or mounting locations. M1, M2, and so on. -----Original Message----- From: Thomas Bauer [mailto:[log in to unmask]] Sent: Friday, May 04, 2001 4:11 PM To: [log in to unmask] Subject: [TN] Ref Des Letter??? I am designing a board which sits under other boards and am using a metal alignment dowel to help with assy alignment. The dilemma at hand is... what type of a ref des letter do I use (top silk layer) to show the placement of these non electrical pins? The pins are designed for electrical usage but I am only using them for a mechanical purpose. They are pressed into a non plated hole and are not soldered on top of the mating board. Any ideas??? THOMAS BAUER SR. PCB DESIGNER POWERWAVE TECHNOLOGIES (EDH) 1117 WINDFIELD WAY (SUITE 100) ElDorado Hills, CA 95762 (916)941-3122 PAGER: (916)491-7461 [log in to unmask] ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------