This is what we use for electronic assembly items including PWA hardware. Fasteners are all 300 series stainless steel 18-8 composition. It is NOT intended to cover torquing values for electrical parts such as stud-mounted diodes, EMI filters, or switches. SCREW SIZE TORQUE TOLERANCE 2-56 32 in. oz. ±4 in. oz. 4-40 5.5 in. lbs. ±.5 in. lbs. 6-32 10.0 in. lbs. ±1 in. lbs. 8-32 20.0 in. lbs. ±1 in. lbs. 10-32 30 in. lbs. ±2 in. lbs. ¼-20 75 in. lbs. ±4 in. lbs. ¼-28 95 in. lbs. ±5 in. lbs. > Rainer G. Blomberg > Honeywell -Space Systems Clearwater Staff Production Engineer > 13350 US Hwy 19 N MS 802-3 > Clearwater, FL 33764-7290 (727) 539-5534 Phone (727) 790-8738 Pager (727) 539-4469 Fax e-mail: [log in to unmask] -----Original Message----- From: peter lee [mailto:[log in to unmask]] Sent: Wednesday, February 06, 2002 2:34 PM To: [log in to unmask] Subject: [TN] Torque requirement Hello, Can anyone provide some general guidelines on the torque requirement for mounting and fastening common hardware onto FR4 materials with threaded steel fasteners, lock washers and bolts? Any table with starting values for common sizes and screw types would be greatly appreciated. Rgds, Peter __________________________________________________ Do You Yahoo!? Send FREE Valentine eCards with Yahoo! Greetings! http://greetings.yahoo.com ---------------------------------------------------------------------------- ----- 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 e-mail to [log in to unmask]: SET Technet NOMAIL To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest 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 e-mail to [log in to unmask]: SET Technet NOMAIL To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest 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 ---------------------------------------------------------------------------------