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AS 1721-1985

AS 1721-1985

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Current

The latest, up-to-date edition.

General purpose metric screw threads (Reconfirmed 2017)

Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Published date

05-17-1985

Publisher

Standards Australia

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Hardcopy - English
PDF 1 User - English
PDF 3 Users - English
PDF 5 Users - English
PDF 9 Users - English
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Specifies requirements for single start parallel metric screw threads having the ISO basic profile for triangular screw threads, covering the size range from 1mm diameter to 355mm diameter inclusive. Provides for a coarse pitch series, a fine pitch series and a constant pitch series, the latter intended for use in applications for which either the coarse or fine pitch series are unsuitable. Gives information on screw thread parameters, tolerances, deviations, thread classes, designation and symbols. Appendices are included giving the basis of the tabulated values, guidelines (with examples) for calculating the limits of size of untabulated screw threads and notes on the production of screw threads.

Committee
ME-028
DocumentType
Standard
ISBN
0 7262 3611 X
Pages
84
ProductNote
Reconfirmed 07/07/2017.This standard has been reconfirmed in Australia in 2017 and remains current in New Zealand. Reconfirmation Notice 07/07/2017
PublisherName
Standards Australia
Status
Current
Supersedes

This standard specifies requirements for single start parallel metric screw threads having the ISO basic profile for triangular screw threads, covering the size range from 1 mm diameter to 355 mm diameter inclusive. The metric screw thread system comprises the following series:(a) The ISO coarse pitch series, which gives graded diameter/pitch combinations in diameters from 1 mm to 68 mm inclusive, and is predominantly intended for commercially produced threaded fasteners.(b) The ISO fine pitch series, which gives graded diameter/pitch combinations in diameters from 1 mm to 33 mm inclusive.(c) The ISO constant pitch series, which gives a series of standard pitches to be associated with diameters from 8 mm to 355 mm inclusive.The standard gives information on screw thread parameters, tolerances, deviations, thread classes, designation and symbols.Due to the methods adopted by ISO for rounding the tabulated values (see Appendix A), the values for the various parameters given in the tables are to be taken as authoritative for the application of this standard.Appendices are included giving the basis of the tabulated values, guidelines (with examples) for calculating the limits of size of untabulated screw threads and notes on the production of screw threads.NOTE: The ISO metric screw thread system, as given in this standard, does not provide for interference fit threads.

Standards Relationship
ISO 261:1973 Identical
ISO 262:1973 Identical
ISO 965-3:1980 Identical
ISO 965-2:1980 Identical
ISO 724:1978 Identical
ISO 965-1:1980 Identical

First published 1975.
Second edition 1985.
Incorporating: Amdt 1-1987.

AS 2052-1977 Metallic conduits and fittings
AS 1897-1976 Electroplated coatings on threaded components (metric coarse series)
AS 1014-1986 Gauging of metric screw threads (Reconfirmed 2018)
AS/NZS 1110:1995 ISO metric precision hexagon bolts and screws
AS 2053-1984 Non-metallic conduits and fittings
AS 1098-1972 Roller-type screw calliper gauges
AS 1214-1983 Hot-dip galvanized coatings on threaded fasteners (ISO metric coarse thread series)
AS 1654-1974 Limits and fits for engineering (Metric units)
AS/NZS 1252:1996 High-strength steel bolts with associated nuts and washers for structural engineering

AS 2470-2005 Steel cylinders for compressed gases - Welded three-piece construction with longitudinal joint - 11 kg to 150 kg (Reconfirmed 2016)
AS 3517-2007 Capillary fittings of copper and copper alloy for non-pressure sanitary plumbing applications (Reconfirmed 2018)
AS 2470-1995 Steel cylinders for compressed gases - Welded - 11 kg to 150 kg
AS 2896-1998 Medical gas systems - Installation and testing of non-flammable medical gas pipeline systems
AS 3777-1990 Shank hooks and large-eye hooks - Maximum 25 t
AS 1275-1985
AS 2319-2001 Rigging screws and turnbuckles
AS/NZS 4331.1:1995 Metallic flanges Steel flanges (Reconfirmed 2020)
AS 2089-1993 Sheave blocks for lifting purposes
AS 3985.1-1991 Manipulating industrial robots - Mechanical interfaces - Circular (form A)
AS 2469-1998 Steel cylinders for compressed gases - Welded two-piece construction - 0.1 kg to 35 kg
AS 1210-2010 Pressure vessels (Reconfirmed 2021)
AS 3517-1995 Capillary fittings of copper and copper alloy for non-pressure sanitary plumbing applications
AS 1359.47-1988 Rotating electrical machines - General requirements Brushes and brush-holders - Dimensions
AS 2710-1984 Screw gauges - Verification
AS 2974-1987 Fluid power systems and components - Metric ports - Dimensions and design
AS/NZS 2496:1995 Breathing attachments for anaesthetic purposes for human use
AS 3577-1999 Steel cylinders for compressed gases - Welded - 150 kg to 500 kg
AS 1364.1-1979 Circular machine screwing dies, circular hand screwing dies and hexagon die-nuts - General purpose metric screw threads
AS/NZS 3188:1995 Approval and test specification - Terminations and glands for mineral-insulated metal-sheathed cables
AS 4041-2006 Pressure piping (Reconfirmed 2016)
AS 2380.2-1991 Electrical equipment for explosive atmospheres - Explosion-protection techniques Flameproof enclosure d
AS 3613-1991 Information technology - Data communications - 15-pole DTE/DCE interface connector and contact number assignments
AS 3577-2006 Steel cylinders for compressed gases - Welded - 150 kg to 500 kg
AS 1214-1983 Hot-dip galvanized coatings on threaded fasteners (ISO metric coarse thread series)
AS/NZS 60065:2003 Audio, video and similar electronic apparatus - Safety requirements (IEC 60065:2001, MOD)
AS 4041-1992 Pressure piping
AS/NZS 1112:1996 ISO metric hexagon nuts, including thin nuts, slotted nuts and castle nuts
AS 2089-2008 Sheave blocks for lifting purposes (Reconfirmed 2019)
AS 1551-1983 Performance of household electrical appliances - Manually operated controls for heating units in ranges, built-in cooking tops and wall-mounted ovens
AS/NZS 4291.2:1995 Mechanical properties of fasteners Nuts with specified proof load values - Coarse thread
AS/NZS 4291.1:1995 Mechanical properties of fasteners Bolts, screws and studs
AS/NZS 60065:2012 Audio, video and similar electronic apparatus - Safety requirements (IEC 60065, Ed.7.2 (2011) MOD)
AS 2528-1982 Bolts, studbolts and nuts for flanges and other high and low temperature applications
AS/NZS 2053.7:2002 Conduits and fittings for electrical installations Rigid metal conduits and fittings (Reconfirmed 2016)
AS/NZS 3260:1993 Approval and test specification - Safety of information technology equipment including electrical business equipment
AS 2317-1998 Collared eyebolts
AS 2103-1978 Dial gauges and dial test indicators (metric series)
AS/NZS 2794:1994 Information technology - Telecommunications and information exchange between systems - 34-pole DTE/DCE interface connector mateability dimensions and contact number assignments
AS 3777-2008 Shank hooks and large eye hooks - Maximum 60 t (Reconfirmed 2019)
AS 2952.2-1988 Earth-moving machinery - Basic shapes and dimensions - Drain, fill and level plugs
AS 2748-1991 Information technology - Data communication - 25-pole DTE/DCE interface connector and contact number assignments
AS 2019-1986 Fluid power - Hydraulic and pneumatic cylinders - Bore and rod dimensions
AS 1210-1997 Pressure vessels
AS 2896-2011 Medical gas systems - Installation and testing of non-flammable medical gas pipeline systems
AS 2318-2006 Swivels for lifting applications (Reconfirmed 2022)
AS 4291.1-2000 Mechanical properties of fasteners made of carbon steel and alloy steel - Bolts, screws and studs
AS/NZS 1110:1995 ISO metric precision hexagon bolts and screws
AS 2741-1992 Shackles
AS/NZS 1873.4:2003 Powder-actuated (PA) hand-held fastening tools - Fasteners
AS 2474-1990 Valves for compressed gas cylinders (diameter-indexed outlets)
AS 2181.1-1978 Screwing Taps General Purpose Metric Screw Threads
AS 2469-2005 Steel cylinders for compressed gases - Welded two-piece construction - 0.1 kg to 150 kg
AS 1014-1986 Gauging of metric screw threads (Reconfirmed 2018)
AS/NZS 1873.4:1994 Powder-actuated (PA) hand-held fastening tools - Fasteners
AS 2468-1989 Steel cylinders for compressed gases - Brazed - 0.1 kg to 11 kg
AS/NZS 3612:1994 Information technology - Data communication - 37-pole DTE/DCE interface connector and contact number assignments
AS/NZS 2053.7:1995 Conduits and fittings for electrical installations Rigid metal conduits and fittings
AS 1897-1976 Electroplated coatings on threaded components (metric coarse series)
AS 2741-2002 Shackles (Reconfirmed 2014)
AS 2470-1998 Steel cylinders for compressed gases - Welded three-piece construction with longitudinal joint - 11 kg to 150 kg

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