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  • BS 4A 100:2003

    Current The latest, up-to-date edition.

    Specification for general requirements for bolts and free running nuts of tensile strength not exceeding 1249 MPa

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  31-07-2008

    Publisher:  British Standards Institution

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

    Committees responsible
    Foreword
    1 Scope
    2 Material
    3 Manufacture
    4 Dimensions
    5 Runout and lead threads for rolled threads
    6 Screw thread form and class of fit
    7 Anti-corrosion treatment
    8 Identification marking
    9 Quality assurance procedure
    10 Additional requirements for cold forged and hot-forged bolts
    Appendix A - Dimensions of unified thread identification features
                 on aircraft bolts and nuts
    Publications referred to

    Abstract - (Show below) - (Hide below)

    Describes the general requirements for aerospace bolts and free running nuts of tensile strength not exceeding 1249 MPa.

    Scope - (Show below) - (Hide below)

    This British Standard specifies the general requirements for aerospace bolts and free running nuts of tensile strength not exceeding 1 249 MPa.

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

    Committee ACE/12
    Development Note Supersedes BS 3A100(1991) & 07/30165543 DC. (03/2008) Reviewed and confirmed by BSI, December 2009. (11/2009)
    Document Type Standard
    Publisher British Standards Institution
    Status Current
    Supersedes

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

    12/30262055 DC : 0 BS 4A 104+A2 - SPECIFICATION FOR CORROSION-RESISTING STEEL BOLTS (UNIFIED HEXAGONS AND UNIFIED THREADS) FOR AIRCRAFT
    BS 6SP 4(2000) : 2000 AEROSPACE SERIES - PINS HEADED, PLAIN SHANK, DRILLED, STEEL ALLOY AND CORROSION RESISTING STEEL WITH A STRENGTH CLASS 880 MPA
    12/30261969 DC : DRAFT JUNE 2012 BS 2A 174 - 100 DEGREES COUNTERSUNK HEAD CORROSION-RESISTING STEEL BOLTS (UNIFIED THREADS), STRENGTH CLASS 880 MPA, FOR AIRCRAFT
    BS 2A173(1962) : 1962 SPECIFICATION FOR 100 DEGREES COUNTERSUNK HEAD STEEL BOLTS (UNIFIED THREADS), CADMIUM PLATED, FOR AIRCRAFT
    11/30251779 DC : 0 BS 6SP 4:2000+A3 - PINS HEADED, PLAIN SHANK, DRILLED, STEEL ALLOY AND CORROSION RESISTING STEEL WITH A STRENGTH CLASS 880/1080 MPA
    13/30275815 DC : 0 BS 2A 110+A1 - SPECIFICATION FOR STEEL NUTS (UNIFIED HEXAGONS AND UNIFIED THREADS) FOR SHEAR BOLTS FOR AIRCRAFT
    11/30252412 DC : 0 BS 4A 116 - STEEL PAN HEAD BOLTS (UNIFIED THREADS) (CADMIUM PLATED) FOR AIRCRAFT
    12/30262058 DC : 0 BS 4A114 - SPECIFICATION FOR CORROSION-RESISTING STEEL, MUSHROOM-HEADED, SLOTTED-DRIVE, BOLTS (STRENGTH A CLASS 880/1080)
    BS 2853:1957 Specification for the design and testing of steel overhead runway beams
    BS 4A 116:2012 Steel pan head bolts (Unified threads), cadmium plated, for aircraft
    BS 2762:1956 Notch ductile steel for general structural purposes
    12/30254205 DC : 0 BS 4A 170 + A1 - SPECIFICATION FOR ALUMINIUM ALLOY, MUSHROOM-HEADED, SLOTTED DRIVE, BOLTS (UNIFIED THREAD)
    10/30212959 DC : 0 BS A 400 - SPECIFICATION FOR CORROSION-RESISTING STEEL NUTS, PLAIN AND SLOTTED (UNIFIED HEXAGONS AND UNIFIED THREADS) FOR SHEAR BOLTS FOR AIRCRAFT
    BS 2A110(1962) : 1962 SPECIFICATION FOR STEEL NUTS (UNIFIED HEXAGONS AND UNIFIED THREADS) FOR SHEAR BOLTS FOR AIRCRAFT
    BS 4A170 (1999) : 1999 SPECIFICATION FOR ALUMINIUM ALLOY, MUSHROOM-HEADED, SLOTTED DRIVE, BOLTS (UNIFIED THREAD)
    BS 4A102(2002) : 2002 AEROSPACE SERIES - SPECIFICATION FOR STEEL BOLTS (UNIFIED HEXAGONS AND UNIFIED THREADS) FOR AIRCRAFT
    BS 4A104(2002) : 2002 AEROSPACE SERIES - SPECIFICATION FOR CORROSION-RESISTING STEEL BOLTS (UNIFIED HEXAGONS AND UNIFIED THREADS), STRENGTH CLASS 880 MPA, FOR AIRCRAFT
    15/30281806 DC : 0 BS A 401 TO A 420 - AEROSPACE SERIES - SPECIFICATION FOR SCREWS, PAN AND 100 DEGREES COUNTERSUNK HEAD, HEXALOBULAR DRIVE RECESS (UNIFIED THREADS BELOW 1/4 INCH), VARIOUS MATERIALS
    12/30264058 DC : DRAFT JULY 2012 BS 4A 113 A1 - SPECIFICATION FOR CADMIUM-PLATED, MUSHROOM-HEADED, UNIFIED-THREAD, SLOTTED DRIVE, BOLTS
    BS A 400:2010 Specification for nuts, plain and slotted (unified hexagons and unified threads) for shear bolts for aircraft in corrosion-resisting steel
    BS 3A117(1962) : 1962 AEROSPACE SERIES - BOLTS, PAN HEAD, SLOTTED DRIVE, UNIFIED THREADS, CORROSION RESISTING STEEL, STRENGTH CLASS 880 MPA, FOR AIRCRAFT - SPECIFICATION
    15/30266106 DC : 0 BS 3A 117:1962+A2 - SPECIFICATION FOR CORROSION-RESISTING STEEL PAN HEAD BOLTS (UNIFIEDTHREADS) FOR AIRCRAFT
    BS 4A113(1999) : 1999 AEROSPACE SERIES - SPECIFICATION FOR CADMIUM-PLATED, MUSHROOM-HEADED, UNIFIED-THREAD, SLOTTED DRIVE BOLTS
    BS 3A 174:2012 100° Countersunk head, D-slot recess, corrosion-resisting steel bolts (Unified threads), Strength Class 880 MPa, for aircraft
    BS 2A 260-2A 265:2010 Specification for pan and 100° countersunk slotted head screws with ISO metric screw threads
    BS 4A114(1999) : 1999 SPECIFICATION FOR CORROSION-RESISTING STEEL, MUSHROOM-HEADED, SLOTTED-DRIVE, BOLTS, STRENGTH CLASS 880 MPA
    BS A 401-420:2015 Specification for screws, pan and 100° countersunk head, hexalobular drive recess (unified threads below ¼ inch) in various materials
    12/30264056 DC : DRAFT JULY 2012 BS 4A 102 A2 - SPECIFICATION FOR STEEL BOLTS (UNIFIED HEXAGONS AND UNIFIED THREADS) FOR AIRCRAFT
    09/30199785 DC : 0 BS 6S 100 - PROCEDURE FOR INSPECTION, TESTING AND ACCEPTANCE OF WROUGHT STEELS (OTHER THAN PLATE, SHEET, STRIP AND TUBE)
    BS A 211:1961 Specification for 100° countersunk head steel bolts (Unified threads and cruciform recesses) for aircraft
    BS 3A 170:1962 Specification for aluminium alloy mushroom head bolts (Unified threads) for aircraft

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

    BS 240:1986 Method for Brinell hardness test and for verification of Brinell hardness testing machines
    BS 4S100(1975) : 1975 PROCEDURE FOR INSPECTION AND TESTING OF WROUGHT STEELS (OTHER THAN SHEET, STRIP AND TUBES)
    BS 4084:1996 UNJ threads, with controlled root radius, for aerospace. Inch series
    DEFSTAN 03-19/2(1994) : 1994 ELECTRO-DEPOSITION OF CADMIUM
    BS M 39:1972 Method for penetrant inspection of aerospace materials and components
    BS A 346:2000 UNJ threads. General requirements and limit dimensions
    DEFSTAN 03-19/3(2005) : 2005 ELECTRO-DEPOSITION OF CADMIUM
    BS A 231:1982 Specification for runout and lead threads for rolled threads
    DEFSTAN 03-24/5(2008) : 2008 CHROMIC ACID ANODIZING OF ALUMINIUM AND ALUMINIUM ALLOYS
    BS 1134:1961 Centre-line-average height method for the assessment of surface texture
    DEFSTAN 03-24/3(1997) : 1997 AMD 1 1999 CHROMIC ACID ANODIZING OF ALUMINIUM AND ALUMINIUM ALLOYS
    BS 5750-2:1987 Quality systems Specification for production and installation
    BS 93:1951 Specification for British Association (B.A.) screw threads with tolerances for sizes 0 B.A. to 16 B.A.
    DEFSTAN 03-24/2(1988) : 1988 CHROMIC ACID ANODIZING OF ALUMINIUM AND ALUMINIUM ALLOYS
    DEFSTAN 03-24/1(1984) : 1984 CHROMIC ACID ANODIZING OF ALUMINIUM AND ALUMINIUM ALLOYS
    BS 6072:1981 Method for magnetic particle flaw detection
    BS EN ISO 3887:2003 Steels. Determination of depth of decarburization
    BS 427:1990 Method for Vickers hardness test and for verification of Vickers hardness testing machines
    BS 4A 4:1966 Test pieces and test methods for metallic materials for aircraft. Metric units
    BS 6001(1972) : AMD 5054 SAMPLING PROCEDURES FOR INSPECTION BY ATTRIBUTES - SPECIFICATION FOR SAMPLING PLANS INDEXED BY ACCEPTABLE QUALITY LEVEL (AQL) FOR LOT - BY - LOT INSPECTION
    BS 84:2007 Parallel screw threads of Whitworth form. Requirements
    ISO 3161:1999 Aerospace — UNJ threads — General requirements and limit dimensions
    DEFSTAN 03-24/4(2003) : 2003 CHROMIC ACID ANODIZING OF ALUMINIUM AND ALUMINIUM ALLOYS
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