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Head and wrench size US bolts: Bolts, nuts and threaded rods - torque, tension and loads. Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more. The number, diameter and length of studs for cast iron flanges class 125 and 250. ANSI/SO, DIN and JIS bolts.
Use the Mudge Fasteners bolt head size chart to determine the head size, and wrench or socket size required, for any hex bolt or lag screw you use.
Hex Bolt Head Dimensions. The following table of hex bolt head dimensions was adapted from ASME B18.6.3, Table 29, "Dimensions of Plain (Unslotted) and Slotted Regular and Large Hex Head Screws." This table is used for smaller size hardware.
ANSI/ISO, DIN and JIS metric bolt head and wrench sizes: An Allen key, Allen wrench or hex key is a tool used to drive bolts and screws with hexagonal sockets in their heads. Bolts, nuts and threaded rods - torque, tension and loads. Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more.
Refer to this chart to find the appropriate head size and corresponding wrench or socket size for hex bolts, heavy hex bolts, lag bolts, or square bolts. Regardless if you’re looking for a grade 2, 5 or 8 hex bolt, the dimensions will be identical and the difference lies only in the material.
You’ll most likely need to know the bolt head diameter to determine the wrench size to tighten or loosen the bolt. The bolt body has three dimensions that are essential to any bolt size chart: bolt diameter and thread pitch. In standard bolt size charts, the thread pitch is the number of threads in one inch.
This chart may be used for Hex Bolts & Nuts ASTM A307A, Gr 5, 304 & 316 Stainless Steel 5/16'' 3/8'' 7/16'' Bolt & Nut Diameter Wrench Size 1/4'' 1/2'' 9/16'' 5/8'' 3/4'' 7/8'' 1'' 1 1/8'' ... Wrench Size Charts 1 7/8'' 2'' 2 1/4'' 2 1/2'' 1 3/8'' 1 1/2'' Pacific Coast Bolt 12748 East Florence Ave Santa Fe Springs, CA 90670
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
Master the relationship between bolt size and wrench size with our chart. Learn how to choose the right tools for your mechanical projects.
IMPORTANT: Make sure to print this chart to Actual Size (no scaling). After printing, measure the ruler in the margin to ensure correct scale. See for more details. www.boltdepot.com/tools boltdepot.com/tools.