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  • BS 2045:1965

    Withdrawn A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

    Preferred numbers

    Available format(s):  Hardcopy, PDF

    Withdrawn date:  14-06-2016

    Language(s):  English

    Published date:  10-08-1965

    Publisher:  British Standards Institution

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

    Cooperating organizations
    Foreword
    Introduction
    1. Scope
    Part 1. Preferred numbers
    2. Derivation
    3. Nomenclature and definitions
    4. Designation
    5. Series of preferred numbers
    Part 2. Guidance in the use of preferred numbers and
    series of preferred numbers
    6. Choice of series
    7. More rounded values of preferred numbers
    Tables
    1. Basic series of preferred numbers
    2. Derivation of basic series
    3. R80 series of preferred numbers for exceptional use
    4. More rounded values of preferred numbers
    Appendices
    A. International examples of the use of preferred
         numbers
    B. Recommendations for calculating with preferred
         numbers

    Abstract - (Show below) - (Hide below)

    Details of the R5, R10, R20, R40 and R80 series and of the more rounded values of preferred numbers, together with a general introduction to the subject (based on BS 1638, now withdrawn) and guidance in the use of preferred numbers and series of preferred numbers. International examples of the use of preferred numbers and recommendations for calculating with them are appended.

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

    Committee W/-
    Development Note Supersedes D63/1456 DC (06/2005) Reviewed and confirmed by BSI, January 2011. (12/2010)
    Document Type Standard
    Publisher British Standards Institution
    Status Withdrawn

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

    BS MA 79:1978 Specification for jib cranes: ship mounted type
    BS QC 300000:1983 Harmonized system of quality assessment for electronic components. Fixed capacitors for use in electronic equipment. Generic specification
    BS QC 300100:1991 Harmonized system of quality assessment for electronic components. Fixed capacitors for use in electronic equipment. Sectional specification: fixed polyethylene-terephthalate film dielectric metal foil d.c. capacitors
    BS 9925-0:1984 Harmonized system of quality assessment for electronic components. Inductor and transformer cores for telecommunications Generic specification
    BS 6885:1988 Specification for miniature cartridge fuse links for use on printed wiring boards
    BS 4480-8:1984 Plain bearings: metric series Specification for dimensions, tolerances and methods of checking of thin-walled flanged half bearings
    BS CECC 16000-1:1992 Harmonized system of quality assessment for electronic components. Generic specification: electromechanical all-or-nothing relays General
    BS 4506:1970 Specification for shaft ends
    BS 6600-1:1987 Outline dimensions of transformers and inductors for use in telecommunication and electronic equipment Specification for the outline dimensions of transformers and inductors using YEI-1 laminations
    BS CECC 00111-3:1991 Rule of Procedure 11. Specifications Regulations for CECC Specifications for components for general and professional (civil and military) usage (excluding detail specifications)
    BS EN 61050:1992 Specification for transformers for tubular discharge lamps having a no-load output voltage exceeding 1000 V (generally called neon-transformers). General and safety requirements
    BS CECC 31600:1991 Harmonized system of quality assessment for electronic components: sectional specification. Fixed capacitors with paper and paper/plastics dielectrics
    BS QC 400200:1993 Harmonized system of quality assessment for electronic components. Fixed resistors for use in electronic equipment. Sectional specification: fixed power resistors
    BS QC 300900:1991 Harmonized system of quality assessment for electronic components. Fixed capacitors for use in electronic equipment. Sectional specification: fixed polystyrene film dielectric metal foil d.c. capacitors
    BS 9070-4:1971 Specification for fixed capacitors of assessed quality: generic data and methods of test Polystyrene dielectric capacitors
    BS 6450-4:1993 Private branch exchanges for connection to public switched telephone networks run by certain public telecommunications operators Specification for ports
    BS 5535:1978 Specification for right angle and box angle plates
    BS 6722:1986 Recommendations for dimensions of metallic materials
    BS EN 874:1995 Gas welding equipment. Oxygen/fuel gas blowpipes (cutting machine type) of cylindrical barrel. Type of construction, general specifications, test methods
    BS 4999-141(2004) : 2004 GENERAL REQUIREMENTS FOR ROTATING ELECTRICAL MACHINES - PART 141: SPECIFICATION FOR STANDARD DIMENSIONS
    EN 60289:1994/A11:2002 REACTORS
    BS 2634-1:1987 Roughness comparison specimens Specification for turned, ground, bored, milled, shaped and planed specimens
    BS CECC 20000:1983 Harmonized system of quality assessment for electronic components: generic specification: semiconductor optoelectronic and liquid crystal devices
    BS QC 160000-1:1987 Harmonized system of quality assessment for electronic components. Electrical relays. Generic specification: electromechanical all-or-nothing relays Test and measurement procedures
    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 7834:1995 Specification for turbine meters used for the measurement of gas flow in closed conduits
    PD 7010:1997 Essential requirements for a handset telephony facility provided by terminal equipment intended for direct connection to an analogue interface of the public switched telephone network
    BS 9070-1&2(1969) : 1969 AMD 7393 SPECIFICATION FOR FIXED CAPACITORS OF ASSESSED QUALITY: GENERIC DATA AND METHODS OF TEST - PRINCIPLES AND MANDATORY PROCEDURES - GENERAL RULES FOR DRAFTING DETAIL SPECIFICATIONS
    BS MA 57:1975 Specification for ships\' deck machinery - rope storage reels
    BS 9150:1983 Specification for electrical relays of assessed quality: generic data and methods of test
    BS MA 44:1974 Recommendations for the co-ordination of dimensions in shipbuilding: principles of dimensional co-ordination
    BS QC 420000:1992 Harmonized system of quality assessment for electronic components. Varistors for use in electronic equipment: generic specification
    BS 5186:1975 Specification for shaft centre heights
    BS 6620-2:1991 Industrial plate screens Guide for screens of thickness below 3 mm
    BS QC 300800:1991 Harmonized system of quality assessment for electronic components. Fixed capacitors for use in electronic equipment. Sectional specification for fixed tantalum chip capacitors
    BS 5786-1:1979 Variable capacitors Methods of test
    BS QC 390000:1992 Harmonized system of quality assessment for electronic components. Fixed film resistor networks for use in electronic equipment. Generic specification
    BS 7372-3:1993 Guide to the choice of aperture size and wire diameter combinations for industrial wire screens and woven wire cloth Preferred combinations for pre-crimped or pressure-welded wire screens
    BS 6493-1.1:1984 Semiconductor devices. Discrete devices General
    BS 4114:1967 Specification for dimensional and quantity tolerances for steel drop and press forgings and for upset forgings made on horizontal forging machines
    BS CECC 30500:1989 Harmonized system of quality assessment for electronic components. Sectional specification: fixed metallized polycarbonate film dielectric capacitors for direct current
    BS 3877:1991 Specification for metal cutting bandsaw blades
    BS 1432:1987 Specification for copper for electrical purposes: high conductivity copper rectangular conductors with drawn or rolled edges
    BS 572:1985 Specification for interchangeable conical ground glass joints
    BS 1916-3:2009 Limits and fits for engineering Guide to tolerances, limits and fits for large diameters
    BS CECC 30400:1984 Harmonized system of quality assessment for electronic components. Sectional specification: fixed metallized polyethylene-terephthalate film dielectric capacitors for direct current
    BS 9120:1988 Specification for radio interference suppression filters of assessed quality: generic data and methods of test
    BS 5703-4:2003 Guide to data analysis and quality control using cusum techniques Cusum methods for discrete (count/classified) data
    BS CECC 30300:1992 Harmonized system of quality assessment for electronic components. Sectional specification: aluminium electrolytic capacitors with solid and non-solid electrolyte
    BS 1916-1:1953 Limits and fits for engineering Limits and tolerances
    BS CECC 41000:1977 Harmonized system of quality assessment for electronic components: generic specification for potentiometers
    BS 2634-2:1987 Roughness comparison specimens Specification for spark-eroded, shot-blasted, grit-blasted, and polished specimens
    BS 5752-5:1991 Methods of test for coffee and coffee products Green coffee: size analysis by manual sieving
    BS CECC 50000:1987 Harmonized system of quality assessment for electronic components. Generic specification: discrete semiconductor devices
    BS CECC 30800:1991 Harmonized system of quality assessment for electronic components. Sectional specification: tantalum surface mounting capacitors
    BS 4657:1990 Method for determining the resolution obtained in microcopying
    BS CECC 30700:1991 Harmonized system of quality assessment for electronic components. Sectional specification: fixed capacitors of ceramic dielectric, class 2
    BS MA 62:1974 Specification for weed grids for sea inlets
    BS 4274-2(1996) : 1996 VISUAL ACUITY TEST TYPES - SPECIFICATION FOR LANDOLT RING OPTOTYPE FOR NON-CLINICAL PURPOSES
    BS 1916-1:2009 Limits and fits for engineering Guide to limits and tolerances
    BS QC 300200:1983 Harmonized system of quality assessment for electronic components. Fixed capacitors for use in electronic equipment. Sectional specification: fixed tantalum capacitors with solid or non-solid electrolyte
    BS EN 129200:1996 Harmonized system of quality assessment for electronic components. Sectional specification: fixed inductors with ceramic or ferrite core wound with copper wire for RF circuits
    BS CECC 42200:1988 Harmonized system of quality assessment for electronic components. Sectional specification: surge suppression varistors
    BS CECC 32200:1989 Harmonized system of quality assessment for electronic components. Sectional specification: fixed chip capacitors with metallized electrodes and polyethylene-terephthalate dielectric for direct current
    BS MA 23:1973 Specification for multi-angle roller fairleads
    09/30192598 DC : 0 BS 1916-1 - LIMITS AND FITS FOR ENGINEERING - PART 1: LIMITS AND TOLERANCES - GUIDE
    BS MA 12-2:1983 Specification for welded steel bollards Cruciform type
    BS 9090:1977 Variable capacitors of assessed quality: generic data and methods of test
    BS CECC 31300:1983 Harmonized system of quality assessment for electronic components: sectional specification: fixed mica dielectric d.c. capacitors
    BS EN 120000:1996 Harmonized system of quality assessment for electronic components. General specification: semiconductor optoelectronic and liquid crystal devices
    BS MA 35:1975 Specification for ships\' deck machinery - windlasses
    BS MA 36:1974 Specification for ships\' deck machinery - topping winches
    BS QC 300500:1989 Harmonized system of quality assessment for electronic components. Fixed capacitors for use in electronic equipment. Sectional specification: fixed metallized polycarbonate film dielectric d.c. capacitors
    BS 1434:1985 Specification for copper for electrical purposes: copper sections in bars, blanks and segments for commutators
    BS EN 60289:1995 Reactors
    BS 3564:1986 Method for size-grading of muscovite mica blocks, thins and films
    BS 5242-1:1987 Tubes for fluid power cylinder barrels Specification for steel tubes with specially finished surfaces
    BS 9520:1983 Specification for electrical connectors of assessed quality for d.c. and low frequency application: generic data, methods of test and capability approval procedures
    BS 466:1984 Specification for power driven overhead travelling cranes, semi-goliath and goliath cranes for general use
    BS 6317:1992 Specification for simple telephones for connection to public switched telephone networks run by certain public telecommunications operators
    BS QC 301900:1992 Harmonized system of quality assessment for electronic components. Fixed capacitors for use in electronic equipment. Sectional specification for fixed multilayer ceramic chip capacitors
    BS 5214-2:1978 Specification for testing machines for rubbers and plastics Constant rate of force application machines
    BS QC 410000:1990 Harmonized system of quality assessment for electronic components: potentiometers for use in electronic equipment
    BS 6450-3.1:1993 Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators. Direct dialling in on private branch exchanges Specification for direct dialling in on private branch exchanges with terminating stations treated as an entirety
    BS 3531-14.2:1990 Implants for osteosynthesis. Intramedullary nailing systems Specification for medullary pins (Rush type) and introducer/extractors
    PD 6572:1992 BS 6833-6:1992. Apparatus using cordless attachments (excluding cellular radio apparatus) for connection to analogueinterfaces of public switched telephone networks. Specification for cordless portable parts and cordless fixed parts asseparate stand alone items of apparatus
    BS EN 140210:1995 Harmonized system of quality assessment for electronic components. Sectional specification: fixed power resistors. Capability approval
    BS 7372-1:1991 Guide to the choice of aperture size and wire diameter combinations for industrial wire screens and woven wire cloth General
    PD 7021:1996 Essential requirements for terminal equipment intended for connection to 4-wire analogue speechband leased lines of the public telecommunications network
    BS 5046:1974 Method for the estimation of equivalent diameters in the heat treatment of steel
    BS 5650:1978 Specification for apparatus for gamma radiography
    BS 9130:1972 Specification for potentiometers of assessed quality: generic data and methods of test
    BS QC 400000:1990 Harmonized system of quality assessment for electronic components. Fixed resistors for use in electronic equipment: generic specification
    BS 9100:1983 Specification for capability approval for custom-built capacitors and capacitor modules: generic data and methods of test
    09/30192613 DC : 0 BS 1916-3 - LIMITS AND FITS FOR ENGINEERING - PART 3: RECOMMENDATIONS FOR TOLERANCES, LIMITS AND FITS FOR LARGE DIAMETERS (GUIDANCE)
    PD 6570-6:1992 Draft standard to match to and work with ETS 300 001/NET4 \'Apparatus using cordless attachments (excluding cellular radioapparatus) for connection to analogue interfaces of public switched telephone networks run by certain public telecommunicationsoperators\' Specification for cordless portable parts and cordless fixed parts as separate stand alone items
    BS MA 12-1:1983 Specification for welded steel bollards Vertical type
    BS 9070-7:1971 Specification for fixed capacitors of assessed quality: generic data and methods of test Mica dielectric capacitors
    BS EN 134000:1995 Harmonized system of quality assessment for electronic components. Generic specification: variable capacitors. (Qualification approval and capability approval)
    BS 7372-2:1991 Guide to the choice of aperture size and wire diameter combinations for industrial wire screens and woven wire cloth Preferred combinations for woven wire cloth
    BS QC 301300:1989 Harmonized system of quality assessment for electronic components. Fixed capacitors for use in electronic equipment. Sectional specification: fixed metallized polypropylene film dielectric a.c. and pulse capacitors
    BS MA 53:1975 Specification for ships\' deck machinery - towing winches for deep sea use
    BS MA 55:1975 Specification for ships\' deck machinery - lifeboat winches
    BS QC 301700:1992 Harmonized system of quality assessment for electronic components. Fixed capacitors for use in electronic equipment. Sectional specification for fixed polycarbonate film dielectric metal foil d.c. capacitors
    BS CECC 42000:1978 Harmonized system of quality assessment for electronic components: generic specification: varistors
    BS QC 300600:1991 Harmonized system of quality assessment for electronic components. Fixed capacitors for use in electronic equipment. Sectional specification for fixed capacitors of ceramic dielectric, class 1
    BS 6620-1:1991 Industrial plate screens Guide for screens of thickness 3 mm and above
    BS QC 300400:1983 Harmonized system of quality assessment for electronic components. Fixed capacitors for use in electronic equipment. Sectional specification: fixed metallized polyethylene terephthalate film dielectric d.c. capacitors
    BS 4480-5:1979 Plain bearings: metric series Dimensions, tolerances and methods of checking thin-walled half bearings
    BS MA 52:1974 Specification for ships\' deck machinery - accommodation ladder winches
    BS 4801-2:1972 Specification for varnish-bonded glass-braided copper conductors Rectangular conductors
    BS 171:1970 Specification for power transformers
    BS 4480-4:1979 Specification for plain bearings: metric series Dimensions, tolerances and methods of checking wrapped bushes
    BS 6339:1983 Specification for dimensions of circular flanges for general purpose industrial fans
    PD 6568:1992 Draft standard to match to and work with ETS 300 001/NET4. Specification for simple telephones for connection to public switched telephone networks run by certain public telecommunications operators
    BS 9070-5:1971 Specification for fixed capacitors of assessed quality: generic data and methods of test Ceramic dielectric capacitors
    BS 6811-1.1:1987 Winding wires. Basic dimensions Specification for diameters of conductors for round winding wires
    BS QC 300700:1992 Harmonized system of quality assessment for electronic components. Fixed capacitors for use in electronic equipment. Sectional specification for fixed capacitors of ceramic dielectric, class 2
    BS 3884-1:1974 Modular units for machine tools Specification for basic units
    BS 2090:1954 Specification for hook spanners, peg spanners, coupling wrenches and the related slots, holes and horns
    BS 3522:1962 Specification for hypodermic surgical mounted needles (Luer fitting)
    BS 9070-6:1971 Specification for fixed capacitors of assessed quality: generic data and methods of test Polycarbonate dielectric capacitors and polyethylene terephthalate dielectric capacitors for d.c. use and polypropylene dielectric capacitors for d.c. and a.c. use
    BS 4189:1967 Specification for conventional typographical character for legibility tests (ISO test character)
    BS QC 301800:1991 Harmonized system of quality assessment for electronic components. Fixed capacitors for use in electronic equipment. Sectional specification for fixed polypropylene film dielectric metal foil d.c. capacitors
    PD 7020:1996 Essential requirements for terminal equipment intended for connection to 2-wire analogue speechband leased lines of the public telecommunications network

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

    BS 1638(1950) : LATEST REPORT ON THE SELECTION OF RANGES OF TYPES AND SIZES (PREFERRED NUMBERS)
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