LE USA - gruppofontana
LE USA® fasteners and provides customers with high quality cold-formed fasteners produced from steel melted and rolled exclusively in the USA. In fact, Fontana Fasteners is the only North American full-service manufacturer and provider of structural bolts, nuts, washers and TC assemblies in the 1⁄2″ – 1 1⁄4″ range.
Symbol for identification of grade, i.e., “325”, applied to head. Line stamped under “A325”. Manufacturer’s identification mark, e.g., “X”, Applied to head (raised or depressed at option of the manufacturer).
Fastenerdata - Head Markings - Fastener Specifications
Head Markings. Fastener manufacturers product identification starts with the manufacturer's symbol marked on the head, all high-grade fastener product contains the manufacturers mark along with the material grade. Link Grade and Class.
Bolt Head Markings and What They Mean - Wilson-Garner
2021年4月10日 · Screw and bolt head markings identify the manufacturer of the fastener and the standard to which the fastener was made. Below, we’ll explore both of those concepts, then connect them together with a few examples.
Head Markings for Bolts and Screws Explained. In the fastener industry, there are multiple organizations that specify the strength and marking requirements for inch (also known as imperial) and metric sizes of fasteners that are commonly sold in the U.S. and around the world.
Fastener Head Markings Decoded - Portland Bolt
2014年10月24日 · Three radial lines will indicate an SAE grade 5 fastener, while six radial lines will indicate an SAE grade 8 fastener. These are the most common grades, but there are others. Our Fastener Identification Markings Chart has a complete list of …
Grade Identification Markings for Carbon Steel Externally Threaded Fasteners 1. In addition to the indicated grade marking, all grades included in this Table must be marked for manufacturer identification. 2. While hex heads are shown, grade markings apply equally to products with other head configurations. 3. Hardnesses are Brinell Hardness ...
Bolts and Rod Ends Specification Data. Note: Manufacturer's identification mark are also stamped when applicable. Tensile Strength: The maxiumum load in tension (pull apart) which a materail can withstand before breaking or fracturing. Yield Strength: The stress at which a specific amount of permanent deformation is produced Proof Load: An ...
MGA Universal Tech - Bolt head markings and strength …
1. In addition to the indicated grade marking, all grades, except A563 grades O, A and B, must be marked for manufacturer identification. 2. The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. When nuts are machined from bar stock the nut must be additionally marked with the letter 'B'. 3.
6. MARKING REQUIREMENTS 6.1 Markings and application. Identification markings are specified in the first column of tables I thru VII. The markings provide optimum legibility and permanent identifica-tion. The height of the markings is commensurate with the size of the fastener(s) being marked. Custodian: Preparing activity: Army - WC Army - WC ...