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  • BS 84:1956

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    SPECIFICATION FOR PARALLEL SCREW THREADS OF WHITWORTH FORM

    Available format(s):  Hardcopy, PDF

    Superseded date:  30-11-2007

    Language(s):  English

    Published date:  01-01-1956

    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)

    Gives definition of form of thread.Contains tables of;basic sizes,limits,"class"bolts tolerances,nuts.Covers BS Whitworth range,1/8in.to 6in.;BS Fine range,3/16in.to 4&3/16in.(no limits and tolerances greater than 3in.)Gives in addition a Selected Thread series which is more appropriate than BS Pipe parallel series for extra fine pitch applications. Contains also various appendices:limits,tolerances for B.S.W.and B.S.F. truncated bolts and nuts;bases of tolerances and allowances,formulae;consequences of mistakes in pitch and angle,extent to which error combination is acceptable;form of Whitworth crests;tolerances and limits for "close class" nuts (non-preferred).

    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

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

    04/30122631 DC : DRAFT SEP 2004 CEN/BT/TF 158 N12 - DISPENSE SYSTEMS FOR DRAUGHT BEVERAGES - PART 9: CONNECTORS AND SOCKETS FOR BEVERAGE CONTAINERS, MATING DIMENSIONS
    BS 3382-7(1966) : 1966 SPECIFICATION FOR ELECTROPLATED COATINGS ON THREADED COMPONENTS - THICKER PLATINGS FOR THREADED COMPONENTS
    BS 4521-4:1975 SPECIFICATION FOR RAILWAY TURNOUTS FOR PRIVATE USERS - HEAVY GRADE TURNOUTS OVER WHICH BRITISH RAILWAYS LOCOMOTIVES DO NOT OPERATE, FOR AXLE LOADS WHICH MAY EXCEED 25 TONS, USING FLAT BOTTOM RAILS
    BS SP8(1939) : 1939 SPECIFICATION FOR TURNBUCKLES (TENSION ROD TYPE) FOR AIRCRAFT PURPOSES
    BS 31:1940 SPECIFICATION - STEEL CONDUIT AND FITTINGS FOR ELECTRICAL WIRING
    BS 10:1962 SPECIFICATION FOR FLANGES AND BOLTING FOR PIPES, VALVES AND FITTINGS
    BS 3777:1964 Specification for screw thread measuring cylinders
    BS 959(1950) : 1950 SPECIFICATION FOR INTERNAL MICROMETERS (INCLUDING STICK MICROMETERS)
    BS 3382-3&4(1965) : 1965 SPECIFICATION FOR ELECTROPLATED COATINGS ON THREADED COMPONENTS - NICKEL OR NICKEL PLUS CHROMIUM ON STEEL COMPONENTS - NICKEL OR NICKEL PLUS CHROMIUM ON COPPER AND COPPER ALLOY (INCLUDING BRASS) COMPONENTS
    BS 341-1:1991 (published 1991-09) Transportable gas container valves Specification for industrial valves for working pressures up to and including 300 bar
    BS 9133 N001-003(1975) : 1975 DETAIL SPECIFICATION FOR SINGLE TURN LOW POWER NON-WIRE WOUND ROTARY POTENTIOMETERS - SPINDLE INSULATED FROM RESISTANCE ELEMENT, SPINDLE AND PANEL SEALED OR CONTAINER, SPINDLE AND PANEL SEALED - FULL ASSESSMENT LEVEL
    BS 1936-1:1952 Undercuts and runouts for screw threads Inch screw threads
    BS 2464(1954) : 1954 SPECIFICATION FOR HOSE COUPLINGS FOR PETROL, OIL AND LUBRICANTS (3/4 INCH TO 4 INCH NOMINAL SIZES)
    BS 2580:1979 SPECIFICATION FOR UNDERGROUND PLUG COCKS FOR COLD WATER SERVICES
    BS 3382-1&2(1961) : 1961 SPECIFICATION FOR ELECTROPLATED COATINGS ON THREADED COMPONENTS - CADMIUM ON STEEL COMPONENTS - ZINC ON STEEL COMPONENTS
    BS 4521-3.1:1974 SPECIFICATION FOR RAILWAY TURNOUTS FOR PRIVATE USERS - MEDIUM GRADE TURNOUTS OVER WHICH BRITISH RAILWAYS LOCOMOTIVES DO NOT OPERATE, FOR AXLE LOADS NOT EXCEEDING 25 TONS - TURNOUTS USING BULL HEAD RAIL
    BS 4521-1.1:1971 SPECIFICATION FOR RAILWAY TURNOUTS FOR PRIVATE USERS - TURNOUTS OVER WHICH BRITISH RAILWAYS LOCOMOTIVES OPERATE - TURNOUTS USING BULL HEAD RAILS
    BS 341-3:2002 Transportable gas container valves Valve outlet connections
    BS 3382-5&6(1967) : 1967 SPECIFICATION FOR ELECTROPLATED COATINGS ON THREADED COMPONENTS - TIN ON COPPER AND COPPER ALLOY (INCLUDING BRASS) COMPONENTS - SILVER ON COPPER AND COPPER ALLOY (INCLUDING BRASS) COMPONENTS
    BS 919-2:1971 SPECIFICATION FOR SCREW GAUGE LIMITS AND TOLERANCES - GAUGES FOR SCREW THREADS OF WHITWORTH AND BA FORMS
    DIN 3542 E : SUSPENDED CONNECTORS AND SOCKETS FOR BEVERAGE CONTAINERS - MATING DIMENSIONS
    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 1184:1976 SPECIFICATION - COPPER AND COPPER ALLOY TRAPS
    BS 1790(1961) : 1961 SPECIFICATION FOR LENGTH BARS AND THEIR ACCESSORIES (IMPERIAL UNITS)
    BS 1968(1953) : 1953 SPECIFICATION FOR FLOATS FOR BALLVALVES (COPPER)
    BS 1010-2:1973 SPECIFICATION FOR DRAW-OFF TAPS AND STOPVALVES FOR WATER SERVICES (SCREW-DOWN PATTERN) - PART 2: DRAW-OFF TAPS AND ABOVE-GROUND STOPVALVES
    BS 325:1947 Specification for black cup and countersunk bolts and nuts
    BS 4521-1.2:1971 SPECIFICATION FOR RAILWAY TURNOUTS FOR PRIVATE USERS - TURNOUTS OVER WHICH BRITISH RAILWAYS LOCOMOTIVES OPERATE - TURNOUTS USING FLAT BOTTOM RAIL
    BS 768:1958 Specification for slotted grub screws
    BS 1083:1965 Specification for precision hexagon bolts, screws and nuts (B.S.W. & B.S.F. threads)
    BS 856:1969 Specification for wing nuts
    BS 3A100(1991) : 1991 AEROSPACE SERIES - SPECIFICATION FOR GENERAL REQUIREMENTS FOR BOLTS AND FREE RUNNING NUTS OF TENSILE STRENGTH NOT EXCEEDING 1249 MPA
    BS 4521-2:1975 SPECIFICATION FOR RAILWAY TURNOUTS FOR PRIVATE USERS - LIGHT GRADE TURNOUTS OVER WHICH BRITISH RAILWAYS LOCOMOTIVES DO NOT OPERATE, FOR AXLE LOADS NOT EXCEEDING 10 TONS, USING FLAT BOTTOM RAILS
    BS 3551(1962) : 1962 SPECIFICATION FOR ALLOY STEEL SHACKLES
    BS 811(1950) : 1950 SPECIFICATION FOR CYCLE (B.S.C.) THREADS (FORMERLY KNOWN AS C.E.I. THREADS)
    BS 327:1964 SPECIFICATION FOR POWER-DRIVEN DERRICK CRANES
    BS 5433(1976) : 1976 SPECIFICATION FOR UNDERGROUND STOPVALVES FOR WATER SERVICES
    BS A55 & A56(1951) : 1951 SPECIFICATIONS FOR GRUB SCREWS FOR AERONAUTICAL PURPOSES
    BS 2452:1954 SPECIFICATION FOR ELECTRICALLY DRIVEN JIB CRANES MOUNTED ON A HIGH PEDESTAL OR PORTAL CARRIAGE (HIGH PEDESTAL OR PORTAL JIB CRANES)
    BS 1580-1&2(1962) : 1962 SPECIFICATION FOR UNIFIED SCREW THREADS - DIAMETERS 1/4 INCH AND LARGER
    BS 2827:1957 Specification for machine screw nuts, pressed type (B.A. and Whitworth form threads)
    BS 357:1958 SPECIFICATION FOR POWER-DRIVEN TRAVELLING JIB CRANES (RAIL-MOUNTED LOW CARRIAGE TYPE)
    BS 5386-3(1980) : 1980 SPECIFICATION FOR GAS BURNING APPLIANCES - PART 3: DOMESTIC COOKING APPLIANCES BURNING GAS
    BS 5590:1978 Specification for screw thread metric series measuring cylinders
    BS 4521-3.2:1975 SPECIFICATION FOR RAILWAY TURNOUTS FOR PRIVATE USERS - MEDIUM GRADE TURNOUTS OVER WHICH BRITISH RAILWAYS LOCOMOTIVES DO NOT OPERATE, FOR AXLE LOADS NOT EXCEEDING 25 TONS - TURNOUTS USING FLAT BOTTOM RAILS
    BS 3SP3(1943) : 1943 SPECIFICATION FOR AIRCRAFT MATERIAL - FORK JOINTS (LOW TENSILE TYPE) (FOR SIZES NO. 4 B.A. TO 1/2 INCH B.S.F. INCLUSIVE)
    BS 1802(1951) : 1951 SPECIFICATION FOR STEEL SPRING WASHERS FOR GENERAL ENGINEERING AND AUTOMOBILE PURPOSES
    BS 450:1958 Specification for machine screws and machine screw nuts (B.S.W. & B.S.F. threads)
    BS 3818(1964) : 1964 SPECIFICATION FOR SELF-SEALING FUELLING COUPLINGS FOR DIESEL LOCOMOTIVES AND DIESEL RAILCARS
    BS AU50-2.3(1994) : 1994 TYRES AND WHEELS - WHEELS AND RIMS - SPECIFICATION FOR ROAD-WHEEL NUTS, STUDS AND BOLTS FOR COMMERCIAL VEHICLES
    BS 1494-1:1964 SPECIFICATION FOR FIXING ACCESSORIES FOR BUILDING PURPOSES - FIXINGS FOR SHEET, ROOF AND WALL COVERINGS
    DEFSTAN 62-9(PT1)/1(1974) : 1974 LAMPHOLDERS; LIGHTS, INDICATOR; AND LENSES, INDICATOR LIGHT; FOR USE IN EQUIPMENTS - PART 1: GENERIC SPECIFICATION

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

    BS 3643-1(1949) : LATEST
    BS 2517(1954) : LATEST DEFINITIONS FOR USE IN MECHANICAL ENGINEERING
    BS 3643-2:1965
    BS 919-3:1968 SPECIFICATION FOR SCREW GAUGE LIMITS AND TOLERANCES - GAUGES FOR ISO METRIC SCREW THREADS
    BS 919-1:1960 SPECIFICATION FOR SCREW GAUGE LIMITS AND TOLERANCES - GAUGES FOR SCREW THREADS OF UNIFIED FORM
    BS 919-2(1952) : LATEST
    BS 2779(1956) : LATEST PIPE THREADS FOR TUBES AND FITTINGS WHERE PRESSURE-TIGHT JOINTS ARE NOT MADE ON THE THREADS (METRIC DIMENSIONS)
    BS 919-4:1964 SPECIFICATION FOR SCREW GAUGE LIMITS AND TOLERANCES - LIMITS OF SIZE FOR GAUGES FOR SCREW THREADS OF UNIFIED FORM DIAMETERS 1/4 IN AND LARGER
    BS 1157(1965) : LATEST TAPPING DRILL SIZES FOR USE WITH FLUTED TAPS
    BS HDBK18(1972) : LATEST METRIC STANDARDS FOR ENGINEERING
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