You can buy ASME B18.3-2012, “Socket Cap, Shoulder, Set Screws, and Hex Keys (Inch Series),” from Document Center Inc. now and the document will ship when it is released from the printers in May. The update revises this classic on general and dimensional data for various types of hexagon socket cap screws, shoulder screws, set screws, and hexagon keys.
You’ll find appendices that provide specifications for hexagon socket gages and gaging, tables showing applicability of keys and bits to various socket screw types and sizes, drill and counterbore sizes for socket head cap screws, and formulas used for dimensional data. And when questions arise concerning the acceptance of product, the dimensions in the tables should be used rather than recalculation by formula.
What are the changes in ASME B18.3 2012 Edition? Spline driven fasteners, and their associated keys, have been removed from the document. Users who want to use this type of fastener will need to refer to the previous ASME B18.3 2003 Edition. The Type VI (Six Lobe) drive style has been added as a mandatory appendix. The tolerance for protrusion requirements on flat head socket cap screws has been increased. An alternative method for measuring protrusion has been included and corresponds with the metric document ISO 10642, “Hexagon Socket Countersunk Head Screws.”
You’ll also find minor changes that include the addition of some sizes and slight changes to the requirements for drilled heads.
This Standard was approved by the American National Standards Institute (ANSI) on November 16, 2012. So that’s why it’s dated 2012 even though it will not be publicly available until May 2013.
Document Center Inc. sells all current ASME Standards, as well as many obsolete editions. You can order the ASME Standards you need at our webstore, www.document-center.com. Or contact us by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com). Document Center has the expertise you need to solve your documentation requirements.
