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  • BS 84:1956

    View superseded by
    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
    View superseded by

    Specification for parallel screw threads of Whitworth form

    Available format(s):  Hardcopy, PDF

    Superseded date:  30-11-2007

    Language(s):  English

    Published date:  26-09-1956

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    Co-operating organizations
    Foreword
    Specification
    1 Scope
    2 Nomenclature and definitions
    3 Form of Whitworth screw threads
    4 Classes of bolts and nuts
    5 Standard diameter-pitch series: limits and
         tolerances
    6 Plated threads
    7 Stainless steel bolts
    8 Selected thread series
         a. Basic sizes
         b. Design sizes
         c. Tolerances
    9 Tolerances on effective diameter, pitch and flank
         angles
    10 Designation of screw threads of Whitworth form
    11 Gauges
    Tables
    Coarse thread series B.S.W.
    1 Basic sizes
    Limits and tolerances
    2 Bolts - Close class
    3 Nuts - Medium class
    4 Bolts - Medium class
         a. Nominal sizes up to and including 3/4 in.
         b. Nominal sizes above 3/4 in.
    5 Nuts - Normal class
    6 Bolts - Free class
         a. Nominal sizes up to and including 3/4 in.
         b. Nominal sizes above 3/4 in.
    Fine thread series B.S.F.
    7 Basic sizes
    Limits and tolerances
    8 Bolts - Close class
    9 Nuts - Medium class
    10 Bolts - Medium class
         a. Nominal sizes up to and including 3/4 in.
         b. Nominal sizes above 3/4 in.
    11 Nuts - Normal class
    12 Bolts - Free class
         a. Nominal sizes up to and including 3/4 in.
         b. Nominal sizes above 3/4 in.
    Selected thread series Whit. S.
    13 Preferred diameters and pitches - Fractional sizes
    13a Preferred diameters and pitches - Decimal sizes
    Selected and non-standard threads
    14 Depths of thread for various pitches
    15 Bolts - Medium and free class allowances
    16 Bolts - Close class tolerances
    17 Nuts - Medium class tolerances
    18 Bolts - Medium class tolerances
    19 Nuts - Normal class tolerances
    20 Bolts - Free class tolerances
    Truncated Whitworth form screw threads with flat crests
    21 Basic data
    Truncated coarse thread series B.S.W.
    22 Bolts and nuts - Limits and tolerances, all classes
    Truncated fine thread series B.S.F.
    23 Bolts and nuts - Limits and tolerances, all classes
    Coarse thread series B.S.W.
    24 Nuts - Close class limits and tolerances
    Fine thread series B.S.F.
    25 Nuts - Close class limits and tolerances
    Selected and non-standard threads
    26 Nuts - Close class tolerances
    Appendices
    A Truncated Whitworth form threads with flat crests
    B Bases of tolerances and allowances for Whitworth
         form screw threads
    C Tolerances on pitch and angle in relation to
         tolerance on effective diameter
    D Notes on the form of the crests of Whitworth threads
    E Close class nuts, limits and tolerances
           Tables 24-26

    Abstract - (Show below) - (Hide below)

    Form of thread defined. Tables: basic sizes, limits, tolerances for \'class\' bolts, nuts; BS Whitworth range, ⅛ in to 6 in; BS Fine range, $9C in to 4$9C in (limits and tolerances up to 3 in only). Also a Selected Thread series more suitable than BS Pipe parallel series for extra fine pitch applications. Appendices: limits, tolerances for B.S.W. and B.S.F. truncated bolts and nuts; bases of tolerances and allowances, formulae; effects of pitch and angle errors, acceptability of error combination; form of Whitworth crests; limits and tolerances for (non-preferred) \'close class\' nuts.

    General Product Information - (Show below) - (Hide below)

    Committee FME/9
    Development Note Inactive for the new design. (10/2005)
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By
    Supersedes

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