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BS 4A 100:2003

Current
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

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

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

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

Committee
ACE/12
DevelopmentNote
Supersedes BS 3A100(1991) & 07/30165543 DC. (03/2008) Reviewed and confirmed by BSI, December 2009. (11/2009)
DocumentType
Standard
Pages
26
PublisherName
British Standards Institution
Status
Current
Supersedes

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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
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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
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12/30264058 DC : DRAFT JULY 2012 BS 4A 113 A1 - SPECIFICATION FOR CADMIUM-PLATED, MUSHROOM-HEADED, UNIFIED-THREAD, SLOTTED DRIVE, BOLTS
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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

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
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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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