BS 3643-1:1981
Superseded
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
ISO metric screw threads Principles and basic data
Available format(s)
Hardcopy , PDF
Superseded date
30-11-2007
Superseded by
Language(s)
English
Published date
31-03-1981
Publisher
Important note : All end users must be registered with an Account prior to user licenses being assigned.
Foreword
Cooperating organizations
Specification
1 Scope
2 References
3 Basic profile
4 General plan
5 Basic dimensions
6 Tolerances: principles and basic data
7 Tolerances: deviations for constructional threads
Appendix
A Notes for guidance
B Outline guide and examples for calculating limits of
size of untabulated metric screw threads
Tables
1 Basic profile dimensions
2 Maximum diameters
3 Diameter/pitch combinations
4 Basic dimensions
5 Fundamental deviations for nut threads and bolt
threads
6 Lengths of thread engagement
7 Minor diameter tolerances of nut thread (TD1)
8 Major diameter tolerance of bolt thread (Td)
9 Pitch diameter tolerance of nut thread (TD2)
10 Pitch diameter tolerance of bolt thread (Td2)
11 Minimum root radii
12 Tolerance classes for nuts
13 Tolerance classes for bolts
14 Deviations
Figures
1 Basic profile of ISO metric thread
2 Basic dimensions
3 Tolerance positions with respect to zero line (basic
size)
4 Nut threads with tolerance position G
5 Nut threads with tolerance position H
6 Bolt threads with tolerance position e, f and g
7 Bolt threads with tolerance position h
8 Bolt root profile
9 Maximum material profiles for internal and external
threads
Applies to single-start parallel screw threads having the ISO basic profile for triangular screw threads. Data for diameters from 1.0 mm to 300 mm are tabulated and an appendix gives the information necessary to calculate the limits of size for exceptions to the tabulated data.
| Committee |
FME/9
|
| DevelopmentNote |
Supersedes 78/80250 DC, BS 3643-1(1949), BS 3643-1(1958), BS 3643-1(1963). (07/2002) Reviewed and confirmed by BSI, November, 2004. (11/2004)
|
| DocumentType |
Standard
|
| Pages |
60
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| BS 5500:1991 | Specification for unfired fusion welded pressure vessels |
| BS 7371-7:1994 | Coatings on metal fasteners Specification for mechanically applied zinc coatings |
| DEFSTAN 02-862(PT5)/2(2007) : 2007 | FASTENERS - PART 5: NON-FERROUS (SUBMARINE FIRST LEVEL QUALITY ASSURED) |
| DEFSTAN 02-862(PT1)/2(2007) : 2007 | FASTENERS - PART 1: GENERAL |
| DEFSTAN 02-862(PT3)/2(2007) : 2007 | FASTENERS - PART 3: NON-FERROUS FASTENERS |
| DEFSTAN 02-304(PT1)/2(2002) : 2002 | SHAFTING SYSTEMS AND PROPULSORS - PART 1: DESIGN REQUIREMENTS FOR MAIN PROPULSION SHAFTING |
| DEFSTAN 47-22/1(1979) : 1979 | END FITTINGS FOR FLEXIBLE HOSE ASSEMBLIES FOR AIRCRAFT - METRIC |
| BS EN ISO 898-6:1996 | Mechanical properties of fasteners Nuts with specified proof load values. Fine pitch thread |
| DEFSTAN 02-862(PT4)/2(2007) : 2007 | FASTENERS - PART 4: FERROUS (SUBMARINE FIRST LEVEL QUALITY ASSURED) |
| DEFSTAN 02-862(PT2)/2(2007) : 2007 | FASTENERS - PART 2: FERROUS |
| DEFSTAN 02-113/1(2005) : 2005 | REQUIREMENT FOR MECHANICAL HANDLING |
| DEFSTAN 81-86/2(2000) : 2000 CORR 2000 | METAL FITTINGS FOR WOODEN CONTAINERS |
| DEFSTAN 02-113(PT3)/2(2000) : 2000 | REQUIREMENTS FOR MECHANICAL HANDLING - PART 3: ANCHOR MACHINERY, COMBINED CAPSTANS AND CABLE HOLDERS, ANCHOR CAPSTANS AND WINDLASSES |
| BS 7751-1:1994 | Prevailing torque type wire thread inserts Specification for ISO metric coarse pitch threads |
| BS 7764:1994 | Specification for hexagon slotted nuts and castle nuts |
| BS 779:1976 | Specification. Cast iron boilers for central heating and indirect hot water supply (44 kW rating and above) |
| BS EN 20898-2:1994 | Mechanical properties of fasteners Nuts with specified proof load values. Coarse thread |
| BS 341-3:2002 | Transportable gas container valves Valve outlet connections |
| BS 6276:1987 | Specification for dimensions and identification code for mounting flanges and shafts ends for hydraulic fluid power pumps and motors |
| BS 6991:1990 | Specification for 6/10 A, two-pole weather-resistant couplers for household, commercial and light industrial equipment |
| BS 1983-6:1994 | Chucks for machine tools and portable power tools Specification for jaw serrations, interfaces and tee nuts |
| BS 4807:1991 | Recommendation for centralized lubrication systems |
| BS EN 88:1991 | Pressure governors for gas appliances for inlet pressures up to 200 mbar |
| BS 6525:1984 | Specification for design and construction of reservoirs used in hydraulic fluid power systems |
| BS 3G 100-2.1:1973 | Specification for general requirements for equipment for use in aircraft. All equipment Construction |
| BS 4656-35:1987 | Accuracy of machine tools and methods of test Specification for capstan, turret and automatic lathes, single spindle type less than 25 mm diameter capacity |
| BS 1560-3.1:1989 | Circular flanges for pipes, valves and fittings (Class designated). Steel, cast iron and copper alloy flanges Specification for steel flanges |
| BS 939:2007 | Engineers\' squares (including cylindrical and block squares). Specification |
| BS 6494-3:1989 | Hydraulic fluid power valve mounting surfaces Specification for pressure-relief valves |
| BS 1127-5:1990 | Screwing dies and dienuts Specification for dimensions of hexagon dienuts |
| BS 1562-2:1973 | Specification for agricultural mower and combine-harvester parts Metric units |
| BS 7531:2006 | Rubber bonded fibre jointing for industrial and aerospace purposes. Specification |
| BS 4791:1985 | Specification for calorimeter bombs |
| BS 7167:1990 | Specification for Bordeaux connections |
| BS 7371-3:1993 | Coatings on metal fasteners Specification for electroplated zinc and cadmium coatings |
| BS 3441:1977 | Specification for tanks for the transport of milk and milk products |
| BS 16:1974 | Specification for telegraph material (insulators, pole fittings, etc.) |
| BS 6331-3:1983 | Mounting dimensions of single rod double acting hydraulic cylinders Specification for 250 bar series |
| BS 779:1989 | Specification for cast iron boilers for central heating and indirect hot water supply (rated output 44 kW and above) |
| BS 7752-1(1994) : 1994 | FREE RUNNING TYPE WIRE THREAD INSERTS - PART 1: SPECIFICATION FOR ISO METRIC COARSE PITCH THREADS |
| BS 6102-8:1982 | Cycles. Specification for screw threads used to assemble freewheels on bicycle hubs |
| BS 6293-2:1982 | MJ threads for aerospace construction Specification for dimensions for bolts and nuts |
| BS 949-4:1990 | Screwing taps Specification for metric ground thread taps: manufacturing tolerances |
| BS 7654:1993 | Specification for single phase street lighting fuses (cut-outs) for low-voltage public electricity distribution systems. 25 A rating for highway power supplies and street furniture |
| BS 7294:1990 | Methods for determination of flow-rate characteristics of pneumatic fluid power components |
| BS MA 24:1974 | Specification for ships\'s side scuttles |
| BS EN 28839:1992 | Mechanical properties of fasteners. Bolts, screws, studs and nuts made of non-ferrous metals |
| BS 5755:1986 | Specification for dimensions of basic features of fluid power cylinders |
| BS 6913-10:1994 | Operation and maintenance of earth-moving machinery Specification for drain, fizz and level plugs |
| BS 7403-13:1991 | Full-flow lubricating oil filters for internal combustion engines Specification for dimensions of spin-on filters |
| BS 3531-15:1992 | Implants for osteosynthesis Specification for devices for the fixation of the ends of the femur in adults |
| BS 4742-7:1989 | Hydraulic equipment for agricultural machinery Specification for port connections for agricultural trailed vehicle hydraulic brake couplings |
| BS 3297-2:1982 | Post insulators of ceramic material or glass for nominal voltages greater than 1000 V Specification for dimensions |
| BS EN 27435:1992 | Slotted set screws with long dog point |
| BS EN 27436:1992 | Slotted set screws with cup point |
| BS 6102-8:1990 | Cycles Specifications for screw threads used to assemble freewheels on bicycle hubs. |
| BS 7531:1992 | Specification for compressed non-asbestos fibre jointing |
| BS 6356-3:1985 | Spraying equipment for crop protection Specification for dimensions of connection threading |
| BS 7752-2:1994 | Free running type wire thread inserts Specification for ISO metric fine pitch threads |
| PD 5500:2003 | Specification for unfired fusion welded pressure vessels |
| BS 7753:1994 | Specification for performance of prevailing torque wire thread inserts |
| BS 856:1969 | Specification for wing nuts |
| BS 4377:1980 | Specification for the tapping of holes to receive wire thread inserts (ISO metric threads) |
| BS 1881-207:1992 | Testing concrete Recommendations for the assessment of concrete strength by near-to-surface tests |
| BS 5983-5:1982 | Metric spherical plain bearings Specification for dimensions and tolerances of spherical plain bearing rod ends, dimension series E and JK |
| BS 4190:2001 | ISO metric black hexagon bolts, screws and nuts. Specification |
| BS 5194-4:1985 | Surgical instruments Specification for scissors, shears and other jointed cutting instruments |
| BS 1981:1991 | Specification for unified machine screws and machine screw nuts |
| BS 7419:1991 | Specification for holding down bolts |
| BS 6494-1:1984 | Hydraulic fluid power valve mounting surfaces Specification for four-port directional control valves |
| BS 7556:1992 | Thermostatic radiator valves. Specification for dimensions and details on connection |
| BS AU 263:1995 | Road vehicles. M14 X 1,25 compact spark-plugs with conical seating and their cylinder head housing |
| BS 6121-3:1990 | Mechanical cable glands Specification for special corrosion resistant glands |
| BS 5194-2:1989 | Surgical instruments Specification for instruments with pivot joints (excluding cutting instruments) |
| BS 6102-10:1987 | Cycles Specification for screw threads used to assemble head fittings on bicycle forks |
| BS 6494-6:1989 | Hydraulic fluid power valve mounting surfaces Specification for pressure-control valves (excluding pressure-relief valves), sequence valves, unloading valves, throttle valves and check valves |
| BS 4190:1967 | Specification for ISO metric black hexagon bolts, screws and nuts |
| BS 5655-8:1983 | Lifts and service lifts Specification for eyebolts for lift suspension |
| BS 6293-1:1982 | MJ threads for aerospace construction Specification for dimensions of basic profile |
| BS 3692:2001 | ISO metric precision hexagon bolts, screws and nuts. Specification |
| BS 6331-1:1983 | Mounting dimensions of single rod double acting hydraulic cylinders Specification for 160 bar medium series |
| BS 6322-1:1982 | Tolerances for fasteners Specification for tolerances of bolts, screws and nuts with thread diameters ≥ 1.6 mm and ≤ 150 mm and product grades A, B and C |
| BS 826:1978 | Specification for steel single tier bolted shelving (angle upright type) |
| BS 2890:1989 | Specification for troughed belt conveyors |
| BS EN 27434:1992 | Slotted set screws with cone point |
| BS 5731:1991 | Specification for mountings and apertures for external equipment controls on agricultural and forestry tractors |
| BS EN 24015:1992 | Hexagon head bolts. Product grade B. Reduced shank (shank diameter pitch diameter) |
| BS 855:1990 | Specification for welded steel boilers for central heating and indirect hot water supply (rated output 44 kW to 3 MW) |
| BS 4999-147:1988 | General requirements for rotating electrical machines Specification for dimensions of brushes and brush-holders for electrical machinery |
| BS PD5500(2006) : 2006 | SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS |
| BS 6494-5:1989 | Hydraulic fluid power valve mounting surfaces Specification for compensated flow-control valves |
| BS 3531-15:1984 | Surgical implants Specification for devices for the fixation of the ends of the femur in adults |
| BS 7670-1:1993 | Steel nuts and bolts for resistance projection welding. Specification for dimensions and properties |
| BS 3934-1:1992 | Mechanical standardization of semiconductor devices Recommendations for the preparation of drawings of semiconductor devices |
| BS 3531-15:1990 | Implants for osteosynthesis Specification for devices for the fixation of the ends of the femur in adults |
| BS EN 29168:1994 | Dental handpieces. Hose connectors |
| BS 341-1:1991 | Transportable gas container valves Specification for industrial valves for working pressures up to and including 300 bar |
| PD 6430:1969 | The adoption of the metric system in the marine industry: report, basic programme and guide |
| BS 3322:1981 | Specification for carpenters\' squares and bevels |
| PD 5500:2000 | SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS |
| BS 7296-1:1990 | Cavities for hydraulic fluid power cartridge valves Specification for two-port slip-in valves |
| BS 6494-2:1986 | Hydraulic fluid power valve mounting surfaces Specification for four-port and five-port servo-valves |
| BS 949-1:1976 | Screwing taps Specification for taps for ISO metric threads |
| BS 7861-1:1996 | Strata reinforcement support system components used in coal mines Specification for rockbolting |
| BS 5306-2:1979 | Fire extinguishing installations and equipment on premises Sprinkler systems |
| BS 3876-5:1990 | Rope rollers, pulleys, mountings and assemblies for colliery track haulage Specification for suspended pulley assemblies and clamps |
| BS 6331-4:1985 | Mounting dimensions of single rod double acting hydraulic cylinders. Specification for 63 bar series, including associated components |
| BS 4862-1:1983 | Mounting dimensions of single rod double acting 10 bar pneumatic cylinders Specification for cylinders up to 25 mm bore |
| BS 6038:1980 | Specification for high-voltage cable plug and socket connections for medical X-ray equipment |
| BS 6578-2:1985 | Laryngoscopic fittings Specification for screw threads for miniature electric lamps and sockets |
| BS EN 297:1994 | Gas-fired central heating boilers. Type B<sub>11</sub> and B<sub>11BS</sub> boilers fitted with atmospheric burners of nominal heat input not exceeding 70 kW |
| BS EN 286-4:1995 | Simple unfired pressure vessels designed to contain air or nitrogen Aluminium alloy pressure vessels designed for air braking equipment and auxiliary pneumatic equipment for railway rolling stock |
| BS 2499-3:1993 | Hot-applied joint sealant systems for concrete pavements Methods of test |
| SAEITC TSC47-022_01 | END FITTINGS FOR HOSE ASSEMBLIES METRIC |
| BS 6105:1981 | Specification for corrosion-resistant stainless steel fasteners |
| BS 6494-4:1989 | Hydraulic fluid power valve mounting surfaces. Specification for clamping dimensions of four-part, size 03 and 05, modular stack valves and directional control valves |
| BS 5194-2:1985 | Surgical instruments Specification for instruments with pivot joints (excluding cutting instruments) |
| BS 1832:1991 | Specification for compressed asbestos fibre jointing |
| BS 227:1995 | Specification for H-section steel arches for use in mines |
| BS 7751-2:1994 | Prevailing torque type wire thread inserts Specification for ISO metric fine pitch threads |
| BS 3643-2:1981 | ISO metric screw threads Specification for selected limits of size |
| BS 6102-9:1990 | Cycles Specification for screw threads used in bottom bracket assemblies |
| BS 7012-9:1989 | Light microscopes Specification for interfacing connector |
| BS 817:1988 | Specification for surface plates |
| BS EN 1281-2:1996 | Anaesthetic and respiratory equipment. Conical connectors Screw-threaded, weight-bearing connectors |
| BS 6623-2:1986 | DTE/DCE interface connectors and pin assignments Specification for 37-pin connector [identical with ISO/DIS 4902 and DAD 1] |
| BS 6623-3:1986 | DTE/DCE interface connectors and pin assignments Specification for 15-pin connector [identical with ISO/DIS 4903 and DAD 1] |
| BS 4862-2:1983 | Mounting dimensions of single rod double acting 10 bar pneumatic cylinders Specification for cylinders, 32 mm bore and over, with detachable mountings |
| BS 2499:1973 | Specification for hot applied joint sealants for concrete pavements |
| BS 6623-1:1985 | DTE/DCE interface connectors and pin assignments Specification for 25-pin connector (ISO DIS 2110 and DAD 1) |
| BS 6331-2:1983 | Mounting dimensions of single rod double acting hydraulic cylinders Specification for 160 bar compact series |
| BS 3486-3:1970 | Specification for wheels for agricultural machinery, implements and trailers Nuts |
| EN 27434:1992 | Slotted set screws with cone point (ISO 7434:1983) |
| EN 28839:1991 | Mechanical properties of fasteners - Bolts, screws, studs and nuts made of non-ferrous metals (ISO 8839:1986) |
| BS 7371-4:1994 | Coatings on metal fasteners Specification for electroplated nickel, nickel/chromium and copper/nickel/chromium coatings |
| BS 5796:1987 | Specification for drain fill and level plugs for earth-moving machinery |
| EN 27435:1992 | Slotted set screws with long dog point (ISO 7435:1983) |
| BS 6448-1:1987 | Gas governors Specification for pressure governors with nominal connection size up to 50 mm for gas appliances with inlet pressure up to and including 200 mbar |
| BS 3172:1987 | Specification for screw threads for spectacle frames |
| BS AU 264:1995 | Road vehicles. M18 X 1,5 spark-plugs with conical seating and their cylinder head housing |
| BS 462:1983 | Specification for wire rope grips |
| BS 7002:1989 | Specification for safety of information technology equipment including electrical business equipment |
| EN 27436:1992 | Slotted set screws with cup point (ISO 7436:1983) |
| BS 6528:1984 | Glossary of terms for cylindrical screw threads |
| BS 919-3:1968 | Specification for screw gauge limits and tolerances Gauges for ISO metric screw threads |
| PD 6494:1980 | Mismatch of screw thread systems |
| BS 6104-1:1981 | Mechanical properties of fasteners Specification for bolts, screws and studs |
| ISO 724:1993 | ISO general-purpose metric screw threads — Basic dimensions |
| BS 6293-2:1994 | Aerospace. MJ threads Limit dimensions for bolts and nuts |
| ISO 965-2:1998 | ISO general purpose metric screw threads — Tolerances — Part 2: Limits of sizes for general purpose external and internal screw threads — Medium quality |
| ISO 262:1998 | ISO general purpose metric screw threads — Selected sizes for screws, bolts and nuts |
| ISO 68:1973 | ISO general purpose screw threads Basic profile |
| BS 3641-3:1973 | Specification for symbols for machine tools. Additional general symbols |
| ISO 9653:1998 | Adhesives Test method for shear impact strength of adhesive bonds |
| ISO 261:1998 | ISO general purpose metric screw threads — General plan |
| ISO 965-1:2013 | ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.