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About This Item

 

Full Description

This Standard covers the complete general and dimensional data for eight product types of inch series square and hex bolts and screws. Also included are appendices covering thread runout sleeve gages, gaging procedure for checking bolt and screw straightness, grade markings for steel bolts and screws, formulas on which dimensional data are based, and a specification to assist in identifying a product as being a screw or a bolt. It should be understood, however, that where questions arise concerning acceptance of product, the dimensions in the tables shall govern over recalculation by formula. Heavy hex structural bolts, formerly covered in ANSI B18.2.1, are now covered in ASME B18.2.6.
 

Document History

  1. ASME B18.2.1-2012

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    Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag Screws (Inch Series), Includes Errata (2013)

    • Most Recent
  2. ASME B18.2.1-2010


    Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag Screws (Inch Series)

    • Historical Version
  3. ASME B18.2.1-1996 (R2005)


    Square and Hex Bolts and Screws - Inch Series

    • Historical Version