It is a lug. Our lugs have eyes for attaching jumper wires that can be soldered to plated through holes in boards. If you try to attach a fastener to a plated through hole, the fastening method (torque, swage, etc.,) will apply enough compressive force crack the hole. The .001 inch of copper plating thickness in the hole is not very sturdy when compared to such huge forces as finger tight. (Multiply torque by a thousand to determine force per square inch.) If your reliability is such that a cracked hole will satisfy your needs, then it might be worth is risk. Mike Green Electronic Packaging Design LMCO-Sunnyvale 408-743-1635 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Bloomquist, Ken Sent: Friday, September 21, 2007 10:14 AM To: [log in to unmask] Subject: Re: [TN] Screwing to a PWB I've gotten some great comments on attaching lugs to our CCA. One thing I was surprised about was that no one seemed to have a problem with screwing something to a multilayer plated through hole. For some reason I always thought that was a bad practice. I always thought that you were only supposed to screw to a non supported hole. Maybe I was wrong. Phil mentioned below to roll swage and then solder to a pad. Again I thought that was forbidden on a PTH. J-Std-001 6.2.5 says that you can't do that. Comments? Thanks, KennyB -----Original Message----- From: Phil Nutting [mailto:[log in to unmask]] Sent: Friday, September 21, 2007 5:09 AM To: TechNet E-Mail Forum; Bloomquist, Ken Subject: RE: [TN] Screwing to a PWB Kenny, This is a common problem for us. Several solution are as follows. 1. Swage in threaded standoffs by RAF, Lyn-tron and Promptus can be roll formed into the board and then soldered. 2. For real heavy leads (6 to 00 AWG) PEM press in studs designed for grounding applications work well. We have some we torque to 55 in*Lbs. We do solder these to the board. 3. For anti-vibration we use Nylon patch screws/bolts or nuts. Check out ND Industries, Long-Loc or Nylok. There are several other competitive products. 4. For connections screwed directly to the boards we use Keystone 6-32 or 10-32 Insert Terminals (Keystone p/n 1284 & 1293). We have tried some of the PEM pcb fasteners, but they were always problematic for assembly folks. Phil --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------