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BS 1580-1:2007

Current
Current

The latest, up-to-date edition.

Unified screw threads Screw threads with diameters ¼ in and larger. Requirements
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

31-08-2009

Publisher

British Standards Institution

Foreword
Section 1: General
1 Scope
2 Normative references
3 Terms and definitions and symbols
4 Profile of unified screw threads
Section 2: Standard series
5 Diameter/pitch combinations
6 Tolerance classes of external and internal threads
7 Limits of size, and tolerances, for uncoated threads
8 Allowances for uncoated threads
9 Coated threads
10 Gauges
11 Designation of unified screw threads
Section 3: Special series (UNS)
12 Diameter/pitch combinations, fractional sizes
13 Diameter/pitch combinations, decimal sizes
14 Tolerance classes of external and internal UNS threads
15 Tolerances and allowances
16 Coated UNS threads
17 Designation of UNS threads
Annexes
Annex A (informative) - Bases of tolerances and allowances
        for unified screw threads [1/4] in and larger
Annex B (informative) - Outline guide, and examples, for
        calculating limits of size of untabulated UNS screw
        threads
Annex C (informative) - Forms of the crest of external threads
Annex D (informative) - General symbols
Annex E (informative) - Tolerances on pitch and flank angle in
        relation to tolerance on effective diameter
Annex F (informative) - Standard unified thread series,
        guidance on selection and use
Annex G (informative) - Standard unified thread series,
        information and guidance regarding the tolerance
        classes
Bibliography

Defines limits of sizes, and tolerances, for single-start, clearance-fit unified screw threads, in inch units, with nominal diameters [1/4] in and above, having the ISO basic profile as specified in BS ISO 68-2:1998.

This part of BS1580 specifies limits of sizes, and tolerances, for single-start, clearance-fit unified screw threads, in inch units, with nominal diameters in and above, having the ISO basic profile as specified in BSISO68‑2:1998. The part of BS1580 specifies the following unified thread series as follows: standard variable pitch series: a coarse thread series (UNC) from in to 4 in nominal diameter; a fine thread series (UNF) from in to in nominal diameter; an extra fine thread series (UNEF) from in to in nominal diameter; standard constant pitch series: a 4-threads per inch series (4 UN) from in to 6 in nominal diameter; a 6-threads per inch series (6 UN) from in to 6 in nominal diameter; an 8-threads per inch series (8 UN) from in to 6 in nominal diameter; a 12-threads per inch series (12 UN) from in to 6 in nominal diameter; a 16-threads per inch series (16 UN) from in to 6 in nominal diameter; a 20-threads per inch series (20 UN) from in to 3 in nominal diameter; a 28-threads per inch series (28 UN) from in to in nominal diameter; a 32-threads per inch series (32 UN) from in to 1 in nominal diameter; a special thread series (UNS) with diameter/pitch combinations other than those specified for the standard series. NOTE1 A transition fit series and an interference fit series of UNC and UNF threads for application to screwed studs are given in BS2693‑1 and -2, respectively. NOTE2 Bases of tolerances and allowances are given in Annex A, guidance for calculating limits of size is given in Annex B, information on crest forms of external threads is given in Annex C, some general symbols are given in Annex D (see 3.2), information on tolerances is given in Annex E, guidance on selection and use of the standard unified thread series is given in Annex F and information and guidance on tolerance classes is given in Annex G.

Committee
FME/9
DevelopmentNote
Supersedes BS 1580-1&2(1962) & 07/30158490 DC. (12/2007) Reviewed and confirmed by BSI, October 2012. (09/2012)
DocumentType
Standard
Pages
118
PublisherName
British Standards Institution
Status
Current
Supersedes

BS 4A113(1999) : 1999 AEROSPACE SERIES - SPECIFICATION FOR CADMIUM-PLATED, MUSHROOM-HEADED, UNIFIED-THREAD, SLOTTED DRIVE BOLTS
ASTM F 3217 : 2017 Standard Guide for Security Fasteners
DEFSTAN 02-862(PT1)/3(2011) : 2011 NAVAL FASTENERS - PART 1: MATERIAL SELECTION AND USE
DEFSTAN 02-862(PT3)/3(2011) : 2011 NAVAL FASTENERS - PART 3: PROCUREMENT OF FIRST LEVEL FASTENERS
DEFSTAN 02-862(PT2)/3(2011) : 2011 NAVAL FASTENERS - PART 2: PROCUREMENT OF NON-FIRST LEVEL FASTENERS
SBAC TS 220 : 1 TECHNICAL SPECIFICATION FOR UNION NUTS, SELF-LOCKING (UNIFIED THREADS) - HIGH TEMPERATURE NICKEL ALLOY INCONEL 718 CLASSIFICATION R[M] >= 1270 MPA (185000 LBF/IN[2]) @ T[A]/+705 DEGREES C
BS PD5500(2015) : 2015 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS
BS PD5500(2009) : 2009 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS
BS 919-4:2007 Screw gauge limits and tolerances Limits of size for gauges for screw threads of unified form diameters 1/4 in and larger
BS 336:1989 Specification for fire hose couplings and ancillary equipment
BS PD5500(2018) : 2018 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS
BS 919-1:2007 Screw gauge limits and tolerances Specification for gauges for screw threads of unified form
BS 336:2010 Specification for fire hose couplings and ancillary equipment
SBAC TS 24 : 6 MANUFACTURING SPECIFICATION FOR BOLTS, 1275 MPA (185,000 LBF/IN[2]) - TENSILE AT ROOM TEMPERATURE, 1000 MPA (145,000 LBF/IN[2]) TENSILE AT 650 DEGREE C
BS 1580-3:2007 Unified screw threads Screw threads with diameters below ¼ in. Requirements
BS PD5500(2012) : 2012 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS
DEFSTAN 02-136/3(2010) : 2010 DESIGN POLICY, PRINCIPLES, TESTING AND ACCEPTANCE REQUIREMENTS FOR WATERTIGHT INTEGRITY OF SUBMARINES
12/30254205 DC : 0 BS 4A 170 + A1 - SPECIFICATION FOR ALUMINIUM ALLOY, MUSHROOM-HEADED, SLOTTED DRIVE, BOLTS (UNIFIED THREAD)
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
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 10:2009 Specification for flanges and bolting for pipes, valves and fittings
12/30264058 DC : DRAFT JULY 2012 BS 4A 113 A1 - SPECIFICATION FOR CADMIUM-PLATED, MUSHROOM-HEADED, UNIFIED-THREAD, SLOTTED DRIVE, BOLTS
BS 3A125 TO 3A[...](1981) : 1981 AEROSPACE SERIES - SPECIFICATION FOR STIFFNUTS (UNIFIED THREADS) FOR AIRCRAFT
BS 8498:2008 British Standards for screw threads and screw gauges. Introduction and guidance
ISO/TR 11364:2012 Gas cylinders Compilation of national and international valve stem/gas cylinder neck threads and their identification and marking system
12/30264056 DC : DRAFT JULY 2012 BS 4A 102 A2 - SPECIFICATION FOR STEEL BOLTS (UNIFIED HEXAGONS AND UNIFIED THREADS) FOR AIRCRAFT
08/30174939 DC : DRAFT JUNE 2008 BS 10 - SPECIFICATION FOR FLANGES AND BOLTING FOR PIPES, VALVES AND FITTINGS

BS 3382-1&2(1961) : 1961 SPECIFICATION FOR ELECTROPLATED COATINGS ON THREADED COMPONENTS - CADMIUM ON STEEL COMPONENTS - ZINC ON STEEL COMPONENTS
BS 6528:1984 Glossary of terms for cylindrical screw threads
BS 3580:1964 Guide to design considerations on the strength of screw threads
BS 2693-2:1964 Specification for screwed studs Recommendations for high grade studs (with Class 5 interference fit threads to American Standard ASA B1.12)
BS 2693-1:1956 Specification for screwed studs General purpose studs
BS 3382-7:1966 Specification for electroplated coatings on threaded components Thicker platings for threaded components
BS ISO 68-2:1998 ISO general purpose screw threads. Basic profile Inch screw threads
BS 84:2007 Parallel screw threads of Whitworth form. Requirements

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Hardcopy - English
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