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BS 1580-3:1965

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Specification for Unified screw threads Diameters below ¼ in
Available format(s)

Hardcopy , PDF

Superseded date

31-12-2007

Language(s)

English

Published date

11-08-1965

Publisher

British Standards Institution

Co-operating organizations
Foreword
Specification
1 Scope
2 ISO/unified thread form
3 Standard thread series
4 Basic sizes
5 Screw thread classes
6 Tolerances allowances and limits of size
7 Designation
8 Gauges
Tables
39 Unified screw threads below 1/4 in diameter,
    standard series
40 Unified screw threads below 1/4 in diameter,
    standard series. Limits of size
Unified coarse screw thread UNC
41 External threads (bolts). Class 2A
42 Internal threads (nuts). Class 2B
43 External threads (bolts). Class 3A
44 Internal threads (nuts). Class 3B
Unified fine screw threads UNF
45 External threads (bolts). Class 2A
46 Internal threads (nuts). Class 2B
47 External threads (bolts). Class 3A
48 Internal threads (nuts). Class 3B
Unified extra fine screw threads UNEF
49 External threads (bolts). Classes 2A and 3A
50 Internal threads (nuts). Classes 2B and 3B
Basic dimensions
51 Unified coarse thread series, UNC
52 Unified fine thread series, UNF
53 Unified extra fine thread series, UNEF
54 Thread data, unified thread form (24 to 80 t.p.i.)
Appendix
    Metric equivalents

Basic sizes, tolerances, allowances and limiting sizes for Unified screw threads from Number 0 (0.060 in diameter) to Number 12 (0.216 in diameter) for Unified fine threads, Number 1 (0.073 in diameter) to Number 12 for Unified coarse threads and Number 12 for the Unified extra fine thread.

Committee
FME/9
DevelopmentNote
Supersedes BS 1580(1953) (07/2004) Reviewed and confirmed by BSI, November, 2004. (11/2004)
DocumentType
Standard
Pages
18
PublisherName
British Standards Institution
Status
Superseded
SupersededBy

Standards Relationship
ISO 68:1973 Similar to

BS 3041-12:1981 Radio-frequency connectors Specification for r.f. coaxial connectors with screw coupling, unmatched (type UHF)
BS A 227:1965 Specification for steel pan head bolts (short thread: Class 3A)
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DEFSTAN 02-862(PT1)/2(2007) : 2007 FASTENERS - PART 1: GENERAL
DEFSTAN 02-862(PT3)/2(2007) : 2007 FASTENERS - PART 3: NON-FERROUS FASTENERS
BS 949-2:1992 Screwing taps Specification for unified ground thread taps. Manufacturing tolerances
DEFSTAN 00-970(PT1)SEC4/5(2007) : 2007 DESIGN AND AIRWORTHINESS REQUIREMENTS FOR SERVICE AIRCRAFT - PART 1: COMBAT AIRCRAFT - SECTION 4: DESIGN AND CONSTRUCTION
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DEFSTAN 02-862(PT4)/2(2007) : 2007 FASTENERS - PART 4: FERROUS (SUBMARINE FIRST LEVEL QUALITY ASSURED)
DEFSTAN 00-970(PT1)SEC4/4(2006) : 2006 DESIGN AND AIRWORTHINESS REQUIREMENTS FOR SERVICE AIRCRAFT - PART 1: COMBAT A/C - SECTION 4: DESIGN AND CONSTRUCTION
BS 949-2:1979 Screwing taps Taps for Unified threads (and for the obsolescent threads of Whitworth and BA forms)
DEFSTAN 66-2(PT2)/2(2007) : 2007 GAUGES, PRESSURE, DIAL INDICATING (BOURDON TUBE TYPE) - PART 2: INDUSTRIAL QUALITY TO COMMERCIAL SPECIFICATIONS
BS 3A 212:1993 Specification for cadmium-plated steel bolts, 55/65 tonf/in<sup>2</sup> (Unified hexagons, 3A Unified threads and close tolerance shanks)
BS 1981:1991 Specification for unified machine screws and machine screw nuts
BS 1157:1975 Recommendations for tapping drill sizes for use with fluted taps
BS 4999-147:1988 General requirements for rotating electrical machines Specification for dimensions of brushes and brush-holders for electrical machinery
BS A 226:1965 Specification for steel hexagon head bolts (short thread: Class 3A)
BS 1127-5:1990 Screwing dies and dienuts Specification for dimensions of hexagon dienuts
BS 3G 100-2.1:1973 Specification for general requirements for equipment for use in aircraft. All equipment Construction
BS 2A 122; 2A 123; 2A 124:1981 Specification for clinch nuts (Unified threads) for aircraft
BS 949-1:1976 Screwing taps Specification for taps for ISO metric threads
BS 3934-1:1992 Mechanical standardization of semiconductor devices Recommendations for the preparation of drawings of semiconductor devices
BS EN 31253:1996 Lasers and laser-related equipment. Laser device. Mechanical interfaces
BS 5590:1978 Specification for screw thread metric series measuring cylinders
BS 7403-13:1991 Full-flow lubricating oil filters for internal combustion engines Specification for dimensions of spin-on filters
BS EN 122200:1995 Harmonized system of quality assessment for electronic components. Sectional specification. Radio frequency coaxial connectors. Series TNC
BS 6578-2:1985 Laryngoscopic fittings Specification for screw threads for miniature electric lamps and sockets
BS 6913-1:1989 Operation and maintenance of earth-moving machinery Guide to common maintenance and adjustment service tools
BS 6913-10:1994 Operation and maintenance of earth-moving machinery Specification for drain, fizz and level plugs
BS 5796:1987 Specification for drain fill and level plugs for earth-moving machinery

BS 3382-1&2(1961) : 1961 SPECIFICATION FOR ELECTROPLATED COATINGS ON THREADED COMPONENTS - CADMIUM ON STEEL COMPONENTS - ZINC ON STEEL COMPONENTS
BS 93:1951 Specification for British Association (B.A.) screw threads with tolerances for sizes 0 B.A. to 16 B.A.
BS 919-1:1960 Specification for screw gauge limits and tolerances Gauges for screw threads of Unified form
BS 1580-1&2(1962) : 1962 SPECIFICATION FOR UNIFIED SCREW THREADS - DIAMETERS 1/4 INCH AND LARGER

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Hardcopy - English
PDF - English
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