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  • BS 1769:1951

    Current The latest, up-to-date edition.

    Specification. Unified black hexagon bolts, screws, nuts (UNC & UNF threads). Heavy series

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  24-09-1951

    Publisher:  British Standards Institution

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

    Co-operating organizations
    Foreword
    1 Scope
    2 Material
    3 Finish
    4 Dimensions
    5 Length of bolts and screws
    6 Ends of bolts and screws
    7 Screw threads
    8 Length of thread
    9 Chamfering
    10 Machined nuts - squareness of thread to face
    11 Diameter of shank of bolts
    12 Marking
    Appendix A - Formulae
    Appendix B - Details of identification marking for
                 Unified hexagon bolts

    Abstract - (Show below) - (Hide below)

    Dimensions, general requirements for sizes ½ in to 2 in. Dimensions of bolts, screws, ordinary nuts, lock nuts, slotted nuts, bolts faced under the head and machined on shank, machined nuts. Formulae for calculation of dimensions for bolts, screw heads, nuts in intermediate sizes, and sizes larger than 2 in.

    Scope - (Show below) - (Hide below)

    This British Standard relates to the Heavy Series of Unified black hexagon bolts, screws and nuts having Unified screw threads in a range of nominal sizes from ½ in. to 2 in. inclusive.

    NOTE It is considered that the range of nominal sizes included in this standard is adequate for most of the applications for which this series is likely to be employed, but for the convenience of users requiring larger sizes, the formulae from which the proportions for bolt heads and nuts are derived are given in Appendix A.

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

    Committee FME/9
    Development Note Reviewed and confirmed by BSI, March 2013. (03/2013)
    Document Type Standard
    Publisher British Standards Institution
    Status Current
    Superseded By

    Standards Referenced By This Book - (Show below) - (Hide below)

    02/707771 DC : 0 BS 192-1 - OPEN-ENDED WRENCHES - PART 1: UNIFIED SIZES
    DEFSTAN 02-862(PT1)/2(2007) : 2007 FASTENERS - PART 1: GENERAL
    BS 1560-3.1:1989 Circular flanges for pipes, valves and fittings (Class designated). Steel, cast iron and copper alloy flanges Specification for steel flanges
    BS CP2010-2(1970) : 1970 PIPELINES - PART 2: DESIGN AND CONSTRUCTION OF STEEL PIPELINES IN LAND
    DEFSTAN 02-862(PT1)/1(2000) : 2000 FASTENERS - PART 1: GENERAL
    BS 1560-3.2:1989 Circular flanges for pipes, valves and fittings (Class designated). Steel, cast iron and copper alloy flanges Specification for cast iron flanges
    PD 5500:2000 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS
    BS 5041-1:1987 Fire hydrant systems equipment Specification for landing valves for wet risers
    02/707773 DC : 0 BS 7586-1 - COMBINATION WRENCHES - PART 1: UNIFIED SIZES
    BS 327:1964 Specification for power-driven derrick cranes
    BS 5154:1991 Specification for copper alloy globe, globe stop and check, check and gate valves
    BS 5353:1989 Specification for steel plug valves
    BS 5041-2:1987 Fire hydrant systems equipment Specification for landing valves for dry risers
    BS 4882:1990 Specification for bolting for flanges and pressure containing purposes
    BS 2853:1957 Specification for the design and testing of steel overhead runway beams
    BS 1414:1975 Specification for steel wedge gate valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries
    BS 3555:1988 Specification for ring wrenches
    BS 5160:1989 Specification for steel globe valves, globe stop and check valves and lift type check valves
    BS 916:1953 Specification for black bolts, screws and nuts, hexagon and square, with B.S.W. threads, and partly machined bolts, screws and nuts, hexagon and square, with B.S.W. or B.S.F. threads
    BS 7794:1995 Specification for square-drive sockets, driving squares and accessories for power-driven socket wrenches
    BS 2583:1955 Specification for podger spanners
    BS 2558:1954 Specification for tubular box spanners
    02/707775 DC : 0 BS 3555-1 - RING WRENCHES - PART 1: UNIFIED SIZES
    DEFSTAN 05-34/2(1984) : 1984 MARKING OF SERVICE MATERIAL
    BS CP118(1969) : 1969 AMD 1129 THE STRUCTURAL USE OF ALUMINIUM
    BS 357:1958 Specification for power-driven travelling jib cranes (rail-mounted low carriage type)
    BS 10:1962 Specification for flanges and bolting for pipes, valves, and fittings
    BS 778:1966 Specification for steel pipes and joints for hydraulic purposes
    BS 1873:1975 Specification for steel globe and globe stop and check valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries
    BS 10:2009 Specification for flanges and bolting for pipes, valves and fittings
    BS 5158:1989 Specification for cast iron plug valves
    BS 1580-1&2(1962) : 1962 SPECIFICATION FOR UNIFIED SCREW THREADS - DIAMETERS 1/4 INCH AND LARGER
    BS 5159:1974 Specification for cast iron and carbon steel ball valves for general purposes
    BS 3351:1971 Specification for piping systems for petroleum refineries and petrochemical plants
    BS 1802:1951 Specification for steel spring washers for general engineering and automobile purposes
    08/30174939 DC : DRAFT JUNE 2008 BS 10 - SPECIFICATION FOR FLANGES AND BOLTING FOR PIPES, VALVES AND FITTINGS
    02/707777 DC : 0 BS 4006-1 - HAND OPERATED SQUARE DRIVE SOCKET WRENCHES - PART 1: UNIFIED SIZES
    BS 759-1:1984 Valves, gauges and other safety fittings for application to boilers and to piping installations for and in connection with boilers Specification for valves, mountings and fittings
    DEFSTAN 02-862(PT1)/3(2011) : 2011 NAVAL FASTENERS - PART 1: MATERIAL SELECTION AND USE

    Standards Referencing This Book - (Show below) - (Hide below)

    BS 969:2008 Specification for limits and tolerances on plain limit gauges
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