ASME B18.2.1-1996
Square and hex bolts and screws (Inch series)

Standard No.

ASME B18.2.1-1996

Release Date

1996

Published By

American Society of Mechanical Engineers (ASME)

Status

Withdraw

Replace By

ASME B18.2.1 Erratum-2003

Latest

ASME B18.2.1-2012(R2021)

Scope

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 appendixes 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.

ASME B18.2.1-1996 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

ASME B18.2.1-1996 -All Parts