BS 84:1956

Superseded

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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Superseded date: 30-11-2007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).

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Committee	FME/9
Development Note	Inactive for the new design. (10/2005)
Document Type	Standard
ISBN
Pages
Published
Publisher	British Standards Institution
Status	Superseded
Superseded By	BS 84:2007
Supersedes	BS 92(1919) : LATEST BS 34(1913) : LATEST

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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	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	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 1212-1:1990	Float operated valves Specification for piston type float operated valves (copper alloy body) (excluding floats)
BS 949-2:1992	Screwing taps Specification for unified ground thread taps. Manufacturing tolerances
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	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 4278:1984	BRITISH STANDARD SPECIFICATION FOR EYEBOLTS FOR LIFTING PURPOSES
BS 5306-2:1990	FIRE EXTINGUISHING INSTALLATIONS AND EQUIPMENT ON PREMISES - SPECIFICATION FOR SPRINKLER SYSTEMS
BS 919-2:1971	SPECIFICATION FOR SCREW GAUGE LIMITS AND TOLERANCES - GAUGES FOR SCREW THREADS OF WHITWORTH AND BA FORMS
BS 1157:1975	Recommendations for tapping drill sizes for use with fluted taps
BS 2853:1957	SPECIFICATION FOR THE DESIGN AND TESTING OF STEEL OVERHEAD RUNWAY BEAMS
BS 64:1992	Specification for normal and high strength steel bolts and nuts for railway rail fishplates
BS 2470:1973	SPECIFICATION FOR HEXAGON SOCKET SCREWS AND WRENCH KEYS - INCH SERIES
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	SPECIFICATION FOR LENGTH BARS AND THEIR ACCESSORIES (IMPERIAL UNITS)
BS 1968:1953	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 3A 100:1991	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	Specification for alloy steel shackles
BS 811:1950	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	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	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 3SP 3:1943	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	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	SPECIFICATION FOR SELF-SEALING FUELLING COUPLINGS FOR DIESEL LOCOMOTIVES AND DIESEL RAILCARS
BS AU 50-2.3:1994	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 1916-2:1953	LIMITS AND FITS FOR ENGINEERING - GUIDE TO THE SELECTION OF FITS IN BS 1916-1
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	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	TAPPING DRILL SIZES FOR USE WITH FLUTED TAPS
BS HDBK18(1972) : LATEST	METRIC STANDARDS FOR ENGINEERING

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