General Fasteners are identified by four or five attributes; Type, Material, Diameter, Length, and Thread Pitch or Count (machine thread fasteners only). This page describes what these attributes represent.
Note: With some fasteners, the terms bolt and screw are frequently used interchangeably. Type Fastener type can be divided into information on the Category or kind of fastener, Drive Type, and Head Style. Category Fasteners are divided into categories based on their function or design. Ex. Wood Screw, Sheet Metal Screw, Hex Bolt, Lag Bolt, etc. Drive Type Fasteners in some categories are available with different drive types such as Philips or Slotted. In other categories such as lag bolts there is either only one drive type or the drive type is implied to be of a standard type. Ex. Philips, Slotted, Allen (a.k.a. Socket), Frearson (similar to Philips), etc. Fastener Type Standard or Implied Drive Bolt Hex Head Lag Bolt/Screw Hex Head Carriage Bolt/Screw No Drive Socket Bolt/Screw Allen Drive Button Head Allen Drive Head Style Many categories are also available with different head shapes or styles. Ex. Flat head, Pan head, Truss head, etc. Material Fastener material describes the material from which the fastener was made as well as any Ex. Stainless Steel, Zinc Plated Steel, Silicon Bronze, etc Diameter Fasteners diameter is measured either as a size number or as a direct measurement. Length How fastener length is measured varies based on the type of head. As a general rule, the length of fasteners is measured from the surface of the material, to the end of the fastener. For fasteners where the head usually sits above the surface such as hex bolts and pan head screws, the measurement is from directly under the head to the end of the fastener. For fasteners that are designed to be counter sunk such as flat head screws, the fastener is measured from the point on the head where the surface of the material will be, to the end of the fastener. Thread Pitch or Count Thread pitch or thread count is used only on machine thread fasteners (those that take a nut or thread into a tapped hole). The thread pitch or count describes how fine the threads are. ********************************************************************** This message and its attachments may contain legally privileged or confidential information. If you are not the intended recipient, you must not disclose or use the information contained in it. If you have received this e-mail in error, please notify the sender immediately by return e-mail and delete the e-mail. Any content of this message and its attachments which does not relate to the official business of Eraring Energy must be taken not to have been sent or endorsed by Eraring Energy. No warranty is made that the e-mail or attachment(s) are free from computer virus or other defect. ********************************************************************** [Non-text portions of this message have been removed]
