FASTENER IDENTIFICATION GUIDE October 3, 2008 . Revision Information Log . INSTRUCTIONS FOR IDENTIFICATION FOR BOLTS AND STUDS SPECIFICATION AND MATERIAL CODES GRADE MARKING . i.e., “B8M”, applied to head . Manufacturer ’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. This unique guide illustrates fastener manufacturers ’ marks applied to their products and contains markings for herepanies in 41 countries, including both active and inactive marks.

The Fastener Manufacturer Identification Symbols International Guide is the most needed quality document available. The current, hereplete guide for manufacturer identification symbols. herepanies in over 30 countries are represented. FASTENER IDENTIFICATION GUIDE . October 3, 2008 . INSTRUCTIONS FOR IDENTIFICATION FOR BOLTS AND STUDS . Line Stamped under “A 490”. “490”.--77602 Stainless Steel--67604 Shear Connector Stud--65801 .. applied to head . Manufacturer ’s identification mark. GRADE MARKING REQUIRED MARKINGS Symbol for identification of grade.g. The heads of different fasteners can be stamped with a wide variety of markings onto the head . Bolt head markings hereplish two things: they identify both the manufacturer of the bolt and the standard to which the bolt was made.

Bolt Identification Guide . Posted on December 28, 2017 June 19, 2018 by Mike Drouin. and torque is also applied to the head ; a bolt is designed to be tightened by the nut. Next Level Specifics . Many greedy manufacturers will make the screws and bolts of their products so hard to find that you have to call them for replacement parts; The nut manufacturer , at his option, may add other markings to indicate the use of atmospheric corrosion resistant steel. Specifications — ASTM A563 — Carbon and Alloy Steel Nuts. ASTM A194/A194M — Carbon and Alloy Steel Nuts for Bolts for High Pressure and High Temperature Service. Alibaba offers 78 Bolt Manufacturer Head Markings Suppliers , and Bolt Manufacturer Head Markings Manufacturers , Distributors, Factories, Companies. There are 50 OEM, 37 ODM, 6 Self Patent. Find high quality Bolt Manufacturer Head Markings Suppliers on Alibaba.

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.