tag:blogger.com,1999:blog-33306834752486755972011-04-21T11:33:25.253-07:00The Fastener Specialisthttp://www.blogger.com/profile/02686812808610367922noreply@blogger.comBlogger11100tag:blogger.com,1999:blog-3330683475248675597.post-723087369237227892008-06-08T14:37:00.000-07:002008-06-08T14:49:29.351-07:00- All bolts are called out with diameter first, then length, separated by "<strong>x</strong>". To search for a bolt that is <strong>1/2</strong> inch in diameter and <strong>6</strong> inches long is <strong>1/2 x 6</strong>.<br />- All screws are called out with diameter first, then length separated by "<strong>x</strong>". To search for a #6 diameter screw that is 1/2 inch long is <strong>#6 x 1/2</strong>.<br />- Machine screws are called out by TPI (threads per inch). You can find the common coarse and fine threads here. A <strong>6-32 x 3/8</strong> machine screw is a number 6 screw with 32 TPI that is 3/8 of an inch long.Tapping screws, sheet metal screws, self drill screws, any screw that you cannot put a nut on (i.e., sharp threads), can be called out with or without the TPI. If you are not calling out the TPI, always use the pound sign "<strong>#</strong>" to indicate a number size screw. Usually self drill, thread forming and thread cutting screws are called out with the TPI, and all others, like Type A and Type A/B, are called out with a "<strong>#</strong>" To ask for a <strong>6</strong> diameter, <strong>1/2</strong> inch long self drill screw, you would call it out as 6-20 x 1/2. A number 6 diameter, 1/2 inch long type A/B tapping screw would be called out as <strong>#6 x 1/2</strong>.<div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/3330683475248675597-72308736923722789?l=thefastenerspecialist.blogspot.com' alt='' /></div>The Fastener Specialisthttp://www.blogger.com/profile/02686812808610367922noreply@blogger.com0