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. Manufacturer ’s identification mark, e.g., “X” ( on head of bolts and screws and on one end of studs and stud bolts ). ASTM A 193 Grade B8M Class 1 Regular Series and Heavy Series X 67610 B 8 M Symbol for identification of grade, i.e., “B8M”, applied to head . Manufacturer ’s identification mark, e.g., “X” ( Fastener head markings hereplish two things: they identify both the manufacturer of the fastener and the standard to which the fastener was made. We’ll talk about manufacturer head markings first, followed by fastener standards and how they govern the industry.

Hello, I have a hex bolt with the markings SB on one end of the bolt head and then R on the opposite end of the bolt head . I’m trying to find the manufacturer or a location to buy more but the local hardware stores I’ve visited say the bolt is not US or metric standard. The ASTM requires structural bolts to be distinctively marked. These bolt head markings include the manufacturer ’s mark, the grade of bolt (ex. A325, A490), and markings to classify the type of bolt (Type 1 or Type 3). Sep 02, 2010 SAE Grade 5 and Grade 8 with ' Fastener Quality Act' traceability -are- marked with manufacturer mark or name. The 'special' fasteners are also marked with manufacturer info. I -think- the THE is just a marking code from the BigBox stores to let the cashiers ring up the 'right' bolt size for pricing/inventory purposes.

Alibaba offers 80 Bolt Manufacturer Head Markings Suppliers , and Bolt Manufacturer Head Markings Manufacturers , Distributors, Factories, Companies. There are 52 OEM, 38 ODM, 6 Self Patent. Find high quality Bolt Manufacturer Head Markings Suppliers on Alibaba. Fastener Identifi cation Markings: ASTM, SAE, ISO Identifi cation Grade Mark Specifi cation Fastener Description . A490 – Quenched and Tempered Alloy Bolts for Structural Steel Joints 2. SAE Specifi cation: . manufacturer identification . 2. The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts.