Hi K.K., I hate to tell you this, but there are not any IPC standards on solder joints in a thru hole assembly of single-sided PCB (no PTH). The only thing that somewhat acknowledges the much less robust nature of these solder joints relative to the PTH-solder joints is very recent in ANSI/J- STD-001B, October 1996, where in paragraph 6.5.3.1 it is stated: "As an exception to the requirements of 6.5.3, lead terminations in unsupported holes (non-plated through-holes) shall be clinched a minimum of 45 degrees and the lead protrusion for unsupported holes shall be 0.5 mm minimum and must not yiolate minimum electrical spacing requirements." ALL other IPC documents simply require the same of unsupported hole and PTH solder joints. Werner Engelmaier Engelmaier Associates, L.C. Electronic Packaging, Interconnection and Reliability Consulting 7 Jasmine Run Ormond Beach, FL 32174 USA Phone: 904-437-8747, Fax: 904-437-8737 E-mail: [log in to unmask] ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################ ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################