ASME B18.2.1-2012
Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag Screws (Inch Series)

Standard No.
ASME B18.2.1-2012
Release Date
2012
Published By
American Society of Mechanical Engineers (ASME)
Status
Replace By
ASME B18.2.1-2012(R2021)
Latest
ASME B18.2.1-2012(R2021)
Replace
ASME B18.2.1:2010
Scope
This Standard covers the complete general and dimensional data for nine product types of inch series square and hex bolts and screws. Hex flange head and lobed head designs are new in this revision, as are screw sizes 1 5/8, 1 7/8, and 3 1/8 through 6 inches. Appendices covering gages and gaging information plus formulas on which dimensional data are based are included. Heavy hex structural bolts, formerly covered in ANSI B18.2.1, are now covered in ASME B18.2.6.

ASME B18.2.1-2012 history

  • 0000 ASME B18.2.1-2012(R2021)
  • 2012 ASME B18.2.1-2012 Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag Screws (Inch Series)
  • 2010 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)
  • 2003 ASME B18.2.1 Erratum-2003 Square and hex bolts and screws (Inch series); Erratum to ASME B18.2.1-1996
  • 1996 ASME B18.2.1-1996 Square and hex bolts and screws (Inch series)
  • 1990 ASME B18.2.1 Supplement-1990 Supplement to ANSI B 18.2.1-1981: Square and hex bolts and screws - Inch series
  • 1981 ASME B18.2.1-1981 Square and hex bolts and screws - Inch series
Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag Screws (Inch Series)

ASME B18.2.1-2012 -All Parts

ASME B18.2.1 Erratum-2003 Square and hex bolts and screws (Inch series); Erratum to ASME B18.2.1-1996 ASME B18.2.1 Supplement-1990 Supplement to ANSI B 18.2.1-1981: Square and hex bolts and screws - Inch series ASME B18.2.1a Addenda-1999 Square and hex bolts and screws (inch series); Addenda ASME B18.2.2-2022 Nuts for General Applications: Machine Screw Nuts, Hex, Square, Hex Flange, and Coupling Nuts (Inch Series) (B18.2.2 - 2010) ASME B18.2.3.10M-1996 Square Head Bolts (Metric Series) ASME B18.2.3.1M Errata-1980 Metric hex cap screws; Errata ASME B18.2.3.1M-1999(R2011) Metric Hex Cap Screws ASME B18.2.3.2M Errata-1980 Metric formed hex screws; Errata ASME B18.2.3.2M-2005 Metric Formed Hex Screws ASME B18.2.3.3M Errata-1981 Metric heavy hex screws; Errata ASME B18.2.3.3M-2007(R2014) ASME B18.2.3.4M-2001(R2011) Metric Hex Flange Screws ASME B18.2.3.5M Errata-1981 Metric hex bolts; Errata ASME B18.2.3.5M-1979(R2016) Metric Hex Bolts ASME B18.2.3.6M Errata-1981 Metric heavy hex bolts; Errata ASME B18.2.3.6M-1979(R2006) Metric Heavy Hex Bolts ASME B18.2.3.7M Errata-1981 Metric heavy hex structural bolts; Errata ASME B18.2.3.7M-1979(R2006) Metric heavy hex structural bolts; Errata ASME B18.2.3.8M-1981(R1999) ASME B18.2.3.9M-2001(R2020) Metric Heavy Hex Flange Screws ASME B18.2.4.1M Errata-1981 Metric hex nuts, style 1; Errata ASME B18.2.4.1M-2002 Metric Hex Nuts, Style 1 ASME B18.2.4.2M Errata-1982 Metric hex nuts, style 2; Errata ASME B18.2.4.2M-2005 Metric Hex Nuts, Style 2 ASME B18.2.4.3M Errata-1981 Metric slotted hex nuts; Errata ASME B18.2.4.3M-1979(R2017) ASME B18.2.4.4M-1982(R1999)


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