FASTENER IDENTIFICATION GUIDE October 3, 2008 . Revision Information Log Guide for Approved Fasteners October 3, 2008 . 10/03/2008 Vegas Fastener Manufacturing – New Bolt Drawings Ray Rowden . applied to head. Manufacture’s identification mark, e.g., “X” … U. S. Patent and Trademark Office Fastener Insignia Register Active Insignias Oct 30, 2014 Status: Name: Insignia: Rockford Bolt Steel Co. 126 Mill Street Rockford IL 61101 Delaware Corporation 01AE Owner _____ Recordal Date: 7/5/2006 Renewal Date: 7/6/2011 Domestic Fastener Forge, Inc. These are heremon grades, but there are others. Our Fastener Identification Markings Chart hereplete list of bolt grades herepanying head markings. Share. Written December 4, 2007, . but we are unsure of who that manufacturers ’ mark is. You might look through the US Trademark and Patent office website –

hereplimentary PDF of our Fastener Markings chart. Contact American Fastener with any questions or for a custom quote. Identification Grade Mark: Specification: Fastener Description: Material: . marking , all grades, except A563 grades O, A and B, must be marked for manufacturer identification. Hex Bolt Identification, Markings and Strength Chart Table Guide. Hex Bolt Identification, Markings and Strength Chart. Additonal information on bolts is located at the bottom of the webpage. Note: Some bolts share identical head identification and have significantly different strengths. US Bolts: Head Marking Grade and Material Nominal Size Range (inches) Mechanical Properties ; Proof Load (psi) Min. Yield Strength (psi) Min. Tensile Strength

Atlanta Rod and Manufacturing is your top Fastener provider. We are experienced in Fastener identification made of a variety of materials.