15/30281806 DC : 0

Superseded

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

Available format(s)

Hardcopy , PDF

Superseded date

10-31-2015

Language(s)

English

Publisher

British Standards Institution

Foreword
1 Scope
2 Normative references
3 General
4 Quality assurance procedure
5 Material and manufacture
6 Protective finish
7 Freedom from defects
8 Dimensions
9 Head of screws
10 Hexalobular drive recess
11 Unified thread identifier
12 Length of screws
13 Screw threads
14 Ends of screws
15 Length of thread
16 Designation
17 Identification and marking
Annex A (informative) - Screw equivalency quick
        reference guide
Annex B (informative) - Conversion tables
Annex C (informative) - Measuring inspection criteria
        for countersunk heads
Annex D (informative) - Derivation of design of the
        countersunk head
Bibliography

BS A 401 to A 420.

Committee	ACE/12
DocumentType	Draft
Pages	31
PublisherName	British Standards Institution
Status	Superseded
SupersededBy	BS A 401-420:2015

BS 7S 80:2002	High chromium-nickel corrosion resisting steel forging stock, bars, forgings and parts (880 to 1080 MPa: limiting ruling section 100 mm)
BS A 273:1978	Specification for gauging practice for 100° countersunk head fasteners for flushness control
TR 4070 : 1	AEROSPACE SERIES - MOLYBDENUM DISULPHIDE COATINGS - LIST OF COMMERCIAL PRODUCTS
BS EN 3911:2010	Aerospace series. Six lobe recess. Geometrical definition
NAS1800:2004	RECESS, SIX LOBE DRIVE, INTERNAL, DIMENSIONS FOR RECESS AND GAGES
SAE AMS 2417 : 2013	PLATING, ZINC-NICKEL ALLOY
BS S 154:1976	Specification. 2½% nickel-chromium-molybdenum steel billets, bars, forgings and parts (880-1080 MPa: limiting ruling section 150 mm)
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
SAE AMS 03-25 : 2015	SULFURIC ACID ANODIZING OF ALUMINUM AND ALUMINUM ALLOYS
BS S148(1969) : 1969	SPECIFICATION FOR LOW NICKEL-CHROMIUM STEEL (BAR FOR THE MANUFACTURE OF FORGED BOLTS ONLY)
BS 2S 142:1977	Specification for 1% chromium-molybdenum steel billets, bars, forgings and parts (900-1100 MPa: limiting ruling section 40 mm)
BS S130(1964) : LATEST
BS EN 4826:2014	Aerospace series. Zinc-Nickel (12 %-16 % Ni) plating of steels with specified tensile strength ≤ 1 450 MPa, copper alloys, nickel alloys and aluminium alloys for parts and fasteners
BS L 102:1971	Specification for bars and extruded sections of aluminium-copper-magnesium-silicon-manganese alloy (solution treated and aged at room temperature) (not exceeding 200 mm diameter or minor sectional dimension) (Cu 4.4, Mg 0.5, Si 0.7, Mn 0.8)
TR 3775 : 4	AEROSPACE SERIES - BOLTS AND PINS - MATERIALS
BS 2A204,2A206,2A208,A217-A225(1963) : 1963 PD 6167	SPECIFICATIONS FOR MACHINE SCREWS AND NUTS (UNIFIED THREADS) BELOW 1/4 INCH FOR AERONAUTICAL PURPOSES
BS EN 2133:2010	Aerospace series. Cadmium plating of steels with specified tensile strength ≤ 1450 MPa, copper, copper alloys and nickel alloys
SAE AMS 03-19 : 2015	ELECTRO-DEPOSITION OF CADMIUM
BS EN 2516:1997	Passivation of corrosion resisting steels and decontamination of nickel base alloys
BS EN 2398:2008	Aerospace series. Heat resisting steel FE-PA2601(X6NiCrTiMoV26-15). Rm ≥ 900 MPa. Bars for machined bolts. D ≤ 25 mm
BS EN 12166:2011	Copper and copper alloys. Wire for general purposes
BS EN 755-2:2016	Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles Mechanical properties
BS 4A 100:2003	Specification for general requirements for bolts and free running nuts of tensile strength not exceeding 1249 MPa
BS L 168:1978	Specification for bars and extruded sections of aluminium-copper-magnesium-silicon-manganese alloy (solution treated and artificially aged) (not exceeding 200 mm diameter or minor sectional dimension) (Cu 4.4, Mg 0.5, Si 0.7, Mn 0.8)
BS EN ISO 10664:2014	Hexalobular internal driving feature for bolts and screws
BS S 158:1977	Specification for 1% chromium-molybdenum steel bars for the manufacture of forged bolts and forged nuts
BS EN 2284:1991	Specification for sulfuric acid anodizing of aluminium and wrought aluminium alloys
BS 2S 147:1976	Specification for 0.5% nickel-chromium-molybdenum steel bars for the manufacture of forged bolts and forged nuts
BS EN 12163:2011	Copper and copper alloys. Rod for general purposes
BS EN 12164:2011	Copper and copper alloys. Rod for free machining purposes
NAS9800:2014	HEAD PROTRUSION GAGING, 100 DEGREES FLUSH HEAD FASTENERS, GAGE BLOCK, GAGE DIAMETERS AND STYLUS