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The Ulitmate Metric Screw Thread Resource: Basic Dimensions, Classes, Tolerances, Formulas, Charts, and Explanations
The Ulitmate Unified Inch Screw Thread Resource: Basic Dimensions, Classes, Tolerances, Formulas, Charts, and Explanations.
US Machine Screw Sizes. Length is measured from where the surface is assumed to be, to the end of the screw. Therefore, pan head screws are measured from under the head, and flat head screws are measured overall. IMPORTANT: Make sure to print this chart to Actual Size (no scaling).
Diameter: The diameter can range between 1/4″ to 5″. It is also allowed to denote the diameters with a decimal value. For example, 0.250 (1/4″), 0.4375 (7/16″), etc. Pitch: By default, the pitch is given in TPI. For example, 1/4-20 means a thread with a pitch of 20 TPI (1/20=0.05″).
IMPORTANT: Make sure to print this chart to Actual Size (no scaling). After printing, measure the ruler in the margin to ensure correct scale. www.boltdepot.com/tools
These to-scale 'lay-over' charts let you quickly identify dimensions by simply matching up your fastener with the printout. The printable fastener tools series also includes general charts and tools for identifying and measuring fasteners, including a ruler and thread gauge.
Detailed Screw Size Charts for US and International Screws. Our extensive screw size charts include: The Unified Thread Standard (UTS) used mainly in the United States and Canada; The ISO thread size chart used in the rest of the world; Imperial Screw Size Chart (UTS)
Knowing the decimal equivalent for a US screw size is very helpful, especially when using digital calipers to measure screw sizes or when you need to drill a hole to match a screw size. This guide provides conversion charts to help you find the correct fastener size.
Metric screw charts typically include the major diameter, pitch diameter (distance between threads), minor diameter (smallest point of the thread), and the screw length. The ISO metric screw thread system is used for screw measurements in the metric system. Differences and Use Cases.
Free Bolt Size Charts - Screw Charts - Nut Size Charts - All Charts are downloadable and printable pdf formats - Great Online Mechanics Tools for Metric and US.