Unified National Fine class 2B. You will need a Machinist Handbook to get the class definition. Jeffrey A. McGlaughlin PCB Designer Battelle Memorial Institute Columbus Ohio [log in to unmask] -----Original Message----- From: Ed Cosper [SMTP:[log in to unmask]] Sent: Tuesday, 15 June, 1999 13:53 To: [log in to unmask] Subject: [TN] Fab: Tap and die callouts Hi all, I hate to display my ignorance but I need to know what #10-32 UNF-2B thru means. I understand it is a treading requirement with a 10-32 tap but I dont know what "UNF-2b thru"means. Thanks Ed Cosper ################################################################ 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 ################################################################