North american mfg identification markings electronic fasteners. These items include such hardware as rivets, fasteners, bolts, nuts, screws, washers, cables, guides, and. Thread pitch chart thread pitch is the distance between threads expressed in mm. Therefore, these suggested torque calculations are estimates and offered as a guide only. The heads of different fasteners can be stamped with a wide variety of markings onto the head.
Instructions for identification for bolts and studs specification and material codes grade marking required markings astm a 490 type 2 heavy series. See more ideas about makers mark, pottery and pottery marks. We are experienced in fastener identification made of a variety of materials. Bolt head markings and what they mean wilsongarner company. Customs valuation under the trade agreements act of 1979 is a 96page book. Bolt torque charts there are many variables in the torquetension relationship. Hex bolt identification, markings and strength chart. Machine screws with no head for screwing all the way into threaded holes. Use the charts below to help you get a better and more informed idea of the fastener type you will need to complete your next project. Should you find any errors omissions broken links, please let us know feedback. Construction bolt head identification markings guide. Set screws often have a head smaller than the outer diameter of the screw. Atlanta rod and manufacturing is your top fastener provider. Some bolts share identical head identification and have significantly different strengths.
A screw and a bolt are similar types of fastener typically made of metal, and characterized by a. This handbook illustrates identification markings for fasteners. Wood screws have large threads and a smooth shank f or pulling two pieces of material together. Hex bolt identification, markings and strength chart table. Because of the wide use of various identification markings, this military handbook is published to minimize the possibility of introducing duplicate markings. Hex bolt identification, markings and strength chart table guide. Types of fasteners bolt and screw identification chart courtesy of wood screws, machine screws, thread cutting machine screws, sheet metal screws. Cheat guide chart bolts, screws, washers, nuts, drive. Mudge fasteners wants to help you identify what these head markings are and when youll need to know them. Several papers, articles, and books, reflecting various stages of. Fully threaded hex bolts are also known as tap bolts. The marks on the head of a bolt indicate the hardness or strength of the bolt. A comprehensive catalogue of unbrako socket screws and related products.
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