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  • BS 3643-1:2007

    Current The latest, up-to-date edition.

    ISO metric screw threads Principles and basic data

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  31-08-2009

    Publisher:  British Standards Institution

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

    Foreword
    1 Scope
    2 Normative references
    3 Terms and definitions and symbols
    4 Basic profile
    5 General plan
    6 Basic dimensions
    7 Tolerances - Principles and basic data
    8 Tolerances - Deviations for constructional threads
    9 Tolerances - Limits of sizes for hot-dip galvanized
       external screw threads to mate with internal screw
       threads tapped with tolerance position H or G after
       galvanizing
    10 Tolerances - Limits of sizes for internal screw threads
       to mate with hot-dip galvanized external screw threads
       with maximum size of tolerance position h before galvanizing
    Annexes
    Annex A (informative) - Notes for guidance
    Annex B (informative) - Examples of calculations of limits of
            size for metric screw threads
    Bibliography

    Abstract - (Show below) - (Hide below)

    Provides a compilation of principles and basic data for single-start, parallel screw threads having the ISO basic profile for triangular screw threads.

    Scope - (Show below) - (Hide below)

    This part of BS3643 gives a compilation of principles and basic data for single-start, parallel screw threads having the ISO basic profile for triangular screw threads. Guidance on calculating limits of size for metric screw threads not included in Tables 1 to 14 is given in AnnexB.

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

    Committee FME/9
    Development Note Supersedes BS 3643-1(1981). (11/2007)
    Document Type Standard
    Publisher British Standards Institution
    Status Current
    Supersedes

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

    DEFSTAN 81-086/5(2022):2022 Metal Fittings for Wooden Containers
    BS 7371-7:2010 Coatings on metal fasteners Specification for mechanically applied zinc and zinc based coatings
    DEFSTAN 02-862(PT1)/3(2011) : 2011 NAVAL FASTENERS - PART 1: MATERIAL SELECTION AND USE
    DEFSTAN 02-113/2(2010) : 2010 REQUIREMENTS FOR MECHANICAL HANDLING
    BS 7656(1993) : 1993 SPECIFICATION FOR LOW-VOLTAGE POLE-MOUNTING FUSES (CUT-OUTS) - 400 A RATING
    DEFSTAN 02-862(PT3)/3(2011) : 2011 NAVAL FASTENERS - PART 3: PROCUREMENT OF FIRST LEVEL FASTENERS
    DEFSTAN 81-86/3(2007) : 2007 METAL FITTINGS FOR WOODEN CONTAINERS
    DEFSTAN 02-862(PT2)/3(2011) : 2011 NAVAL FASTENERS - PART 2: PROCUREMENT OF NON-FIRST LEVEL FASTENERS
    DEFSTAN 81-086/4(2017) : 2017 FITTINGS METAL AND HANDLES FOR CONTAINERS
    EEMUA 101 : 2013 LIFTING POINTS - A DESIGN GUIDE
    DEFSTAN 02-305/3(2010) : 2010 REQUIREMENTS FOR GEARING - MAIN PROPULSION
    DEFSTAN 02-304(PT1)/3(2015) : 2015 SHAFTING SYSTEMS & PROPULSORS - PART 1: DESIGN REQUIREMENTS FOR MAIN PROPULSION SHAFTING
    BS 2A 260-2A 265:2010 Specification for pan and 100° countersunk slotted head screws with ISO metric screw threads
    BS 8499:2017 Specification for domestic gas meter boxes and meter bracket
    BS 8499:2009 Specification for domestic gas meter boxes and meter bracket
    BS 4439:1969 Specification for screwed studs for general purposes. Metric series
    BS PD5500(2015) : 2015 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS
    BS 4377:1991 Specification for tapping of holes to receive wire thread inserts (ISO metric threads)
    BS 3692:2014 ISO metric precision hexagon bolts, screws and nuts. Specification
    BS 8888:2017 Technical product documentation and specification
    BS 817:2008 Specification for surface plates
    PD ISO/TR 11364:2012 Gas cylinders. Compilation of national and international valve stem/gas cylinder neck threads and their identification and marking system
    BS 8888:2011 Technical product documentation and specification
    BS 8498:2008 British Standards for screw threads and screw gauges. Introduction and guidance
    BS 6366(2011) : 2011 SPECIFICATION FOR STUDS FOR RUGBY FOOTBALL BOOTS
    BS 919-3:2007 Screw gauge limits and tolerances Specification for gauges for screw threads of ISO metric form
    BS PD5500(2009) : 2009 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS
    BS 4882:1990 Specification for bolting for flanges and pressure containing purposes
    BS 3643-2:2007 ISO metric screw threads Specification for selected limits of size
    BS 7654:2010 Specification for single-phase street lighting cut-out assemblies for low-voltage public electricity distribution systems. 25 A rating for highway power supplies and street furniture
    BS 7419:2012 Specification for holding down bolts
    BS 4933:2010 Specification for ISO metric black cup and countersunk head bolts and screws with hexagon nuts
    BS 2A241(2005) : 2005 GENERAL REQUIREMENTS FOR STEEL PROTRUDING-HEAD BOLTS OF TENSILE STRENGTH 1250 MPA (180000 LBF/IN[2]) OR GREATER - SPECIFICATION
    BS 8888:2013 Technical product documentation and specification
    BS 3692:1967 Specification for ISO metric precision hexagon bolts, screws and nuts. Metric units
    BS PD5500(2018) : 2018 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS
    BS 7371-3:2009 Coatings on metal fasteners Specifications for electroplated zinc coatings
    BS 8532:2011 Terminal units for high flow anaesthetic gas scavenging systems. Specification for probes and type-specific connection points
    ISO/TR 11364:2012 Gas cylinders Compilation of national and international valve stem/gas cylinder neck threads and their identification and marking system
    BS 4190:2014 ISO metric black hexagon bolts, screws and nuts. Specification
    BS PD5500(2012) : 2012 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS

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

    BS ISO 965-3:1998 ISO general purpose metric screw threads. Tolerances Deviations for constructional screw threads
    BS ISO 68-1:1998 ISO general purpose screw threads. Basic profile Metric screw threads
    BS ISO 965-4:1998 ISO general purpose metric screw threads. Tolerances Limits of sizes for hot-dip galvanized external screw threads to mate with internal screw threads tapped with tolerance position H or G after galvanizing
    BS 6528:1984 Glossary of terms for cylindrical screw threads
    PD 6494:1980 Mismatch of screw thread systems
    ISO 724:1993 ISO general-purpose metric screw threads — Basic dimensions
    BS EN 20898-2:1994 Mechanical properties of fasteners Nuts with specified proof load values. Coarse thread
    BS ISO 262:1998 ISO general purpose metric screw threads. Selected sizes for screws, bolts and nuts
    BS EN ISO 898-1:2013 Mechanical properties of fasteners made of carbon steel and alloy steel Bolts, screws and studs with specified property classes. Coarse thread and fine pitch thread
    BS ISO 261:1998 ISO general purpose metric screw threads. General plan
    BS ISO 965-5:1998 ISO general purpose metric screw threads. Tolerances Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw threads with maximum size of tolerance position h before galvanizing
    BS EN ISO 4042:2000 Fasteners. Electroplated coatings
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