FASTENERS ISO COMPARISON

Fastener standard comparisons shown in the following table are provided for guidance only as there are often dimensional variations between standards. The ISO Fastener Committee was formed to standardise metric fastener systems. At that time several European and Asian countries had their own designs of metric fasteners. To standardise these designs the ISO TC2 Fastener Committee was formed, the predominant metric fastener standard at the time was DIN so it became the foundational metric fastener standard system from which the eventual ISO fastener standards evolved.

 

 

DIN STANDARD SEQUENCE

DESCRIPTIONDINEN ISODate of current standardmodifiedTitle of replacement standardComment
Unhardened taper pins122339 2339             1992-10Unhardened taper pinsNominal length redefined (with round end)
Parallel pins of unhardened steel and austenitic stainless steel72233823381998-02Parallel pins of unhardened steel and austenitic stainless steelNominal length redefined (with round end) form A+C deleted
Slotted cheese head screws - Product grade A84 12071994-10Slotted cheese head screws - Product grade AModifications of dimensions < 2,5; dimension of slots changed; partly nominal lengths deleted; strength 8.8 deleted
Slotted pan head screws - Product grade A85 15801994-10Slotted pan head screws - Product grade AThread included; dimensions of head and slot changed; strength 8.8 deleted
Slotted set screws with long dog point94 12341998-02Split pinsNo modifications of dimensions
Product grade C washers, designed for use with hexagon head bolts and nuts126 70912000-11Plain washers - Normal series, Product grade CNominal sizes changed
Slotted set screws with long dog point4172743574351992-10Slotted set screws with long dog pointNo modifications of dimensions
Slotted headless screws with shank427 23422004-05Slotted headless screws with shank 
Plain washers - Extra large series, product grade C440 70942000-12Plain washers - Extra large series, product grade CNominal sizes changed, nominal size 24 size "a" redefined to the maximum, square-end hole Form R omitted; (standard DIN 440 still valid)
Slotted set screws with flat point5512476647661992-10Slotted set screws with flat pointNo modifications of dimensions
Slotted set screws with cone point5532743474341992-10Slotted set screws with cone pointNo modifications of dimensions
Hexagon nuts; Metric Thread, Type g5552403440342001-03Hexagon nuts - Product grade CWidth across flats according to DIN ISO 272 included; nominal diameter reduced
Hexagon screws, Thread Approximately to Head, Metric Thread, Type g5582401840182001-03Hexagon head screws - Product grade CNominal size extended; width across flats according to DIN ISO 272 included
Hexagon Bolts without Hexagon Nut - with Hexagon Nut, Type g6012401640162001-03Hexagon head bolts - Product grade CNominal size extended; width across flats according to DIN ISO 272 included
Mushroom head square neck bolts603 86771981-10  
Hexagon socket head cap screws912 47622004-06Hexagon socket head cap screwsNominal size range changed; fine thread deleted (ISO 21269)
Hexagon socket set screws with flat point913 40262004-05Hexagon socket set screws with flat pointNominal sizes M1.4, M1.8, M14, M18 and M22 omitted
Hexagon socket set screws with cone point914 40272004-05Hexagon socket set screws with cone pointNominal sizes M1.4, M1.8, M14, M18 and M22 omitted
Hexagon socket set screws with dog point915 40282004-05Hexagon socket set screws with dog pointNominal sizes M1.4, M1.8, M14, M18 and M22 omitted
Hexagon socket set screws with cup point916 40292004-05Hexagon socket set screws with cup point 
Hexagon head screws - Product grades A and B9332401740172001-03Hexagon head screws - Product grades A and BNominal size extended; width across flats according to DIN ISO 272 included
Hexagon nuts; Metric screw threads; Product grades A and B9342403240322001-03Hexagon nuts, style 1 - Product grades A and BNominal diameter changed, height of the nut changed partially; nuts with fine thread specified in DIN EN ISO 8673; width across flats according to DIN ISO 272 included
Hexagon nuts; Metric screw threads; Product grades A and B9342867386732001-03Hexagon nuts, style 1, with metric fine pitch thread - Product grades A and BNominal diameter changed, height of the nut changed partially; nuts with regular type screw thread specified in DIN EN ISO 4032; width across flats according to DIN ISO 272 included
Hexagon bolts, Metric fine thread, Types m and mg9602876587652001-03Hexagon thin nuts (chamfered) with metric fine pitch thread - Product grades A and BNominal size extended; width across flats according to DIN ISO 272 included
M 8x1 to M 100x4 hexagon head bolts with fine pitch thread9612867686762001-03Hexagon head screws with metric fine pitch thread - Product grades A and BNominal size extended; width across flats according to DIN ISO 272 included
Slotted countersunk (flat) head screws (Countersunk heads according to ISO)963 20091994-10Slotted countersunk flat head screws (common head style) - Product grade ANominal size changed; head dimension changed; thread length changed; strength 8.8 cancelled
Slotted raised countersunk (oval) head screws (Countersunk heads according to ISO)964 20101994-10Slotted raised countersunk head screws (common head style) - Product grade ANominal size changed; head dimension changed; thread length changed; strength 8.8 cancelled
Cross recessed countersunk (flat) head screws (Countersunk heads according to ISO)965 70461994-10Countersunk flat head screws (common head style) with type H or type Z cross recess - Property class 4.8Nominal size changed; head dimension changed; thread length changed; strength 8.8 included (see Part 2); penetration depth of cross slots changed
Cross recessed countersunk (oval) head screws (Countersunk heads according to ISO)966 70471994-10Countersunk raised head screws (common head style) with type H or type Z cross recess - Product grade ANominal size changed; head dimension changed; thread length changed; strength 8.8 omitted; penetration depth of cross slots changed
All-metal prevailing torque type hexagon nuts9802704270421998-02Prevailing torque type (all-metal hexagon nuts), style 2 - Property classes 5, 8, 10 and 12Height of nut changed; width across flat according to ISO 272 included
All-metal prevailing torque type hexagon nuts98030513105131998-02Prevailing torque type all-metal hexagon nuts, style 2, with metric fine pitch thread - Property classes 8, 10 and 12Height of nut changed; width across flat according to ISO 272 included
Prevailing torque type hexagon nuts with non-metallic insert9822704070401998-02Prevailing torque type hexagon nuts (with non-metallic insert), style 1 - Property classes 5, 8 and 10Height of nut changed; width across flat according to ISO 272 included
Prevailing torque type hexagon nuts with non-metallic insert98230512105121998-02Prevailing torque type hexagon nuts (with non-metallic insert), style 1, with metric fine pitch thread - Property classes 6, 8 and 10Height of nut changed; width across flat according to ISO 272 included
Prevailing torque type hexagon thin nuts with non-metallic insert985 105111998-02Prevailing torque type hexagon, thin nuts (with non-metallic insert)Height of nut changed; width across flat according to ISO 272 included
Clevis pins without head14332234023401992-10Clevis pins without headSome other nominal lengths defined
Clevis pins with head14342234123411992-10Clevis pins with headOnly one head dimension. Some other nominal lengths defined
Clevis pins with head14352234123411992-10Clevis pins with headOnly one head dimension. Some other nominal lengths defined
Clevis pins with head14362234123411992-10Clevis pins with headOnly one head dimension. Some other nominal lengths defined
Plain washers for clevis pins; product grade A14402873887381992-10Plain washers for clevis pins; product grade ANominal sizes changed
Clevis pins without head14432234023401992-10Clevis pins without head 
Clevis pins with head14442234123411992-10Clevis pins with headSome other nominal lengths defined
Grooved pins - Fulllength parallel grooved, with pilot14702873987391998-03Grooved pins - Full-length parallel grooved, with pilotNominal lengths redefined. Shear rate increased.
Grooved pins - Fulllength taper grooved14712874487441998-03Grooved pins - Full-length taper groovedNominal lengths redefined. Shear rate increased.
Grooved pins - Half-length taper grooved14722874587451998-03Grooved pins - Half-length taper groovedNominal lengths redefined. Shear rate increased.
Grooved pins - Full-length parallel grooved, with chamfer14732874087401998-03Grooved pins - Full-length parallel grooved, with chamferNominal lengths redefined. Shear rate increased.
Grooved pins - Half-length reverse-taper grooved14742874187411998-03Grooved pins - Half-length reverse-taper groovedNominal lengths redefined. Shear rate increased.
Grooved pins - One-third-length centre grooved14752874287421998-03Grooved pins - One-third-length centre groovedNominal lengths redefined. Shear rate increased.
Grooved pins with round head14762874687461998-03Grooved pins with round headChamfer redefined
Grooved pins with countersunk head14772874787471998-03Grooved pins with countersunk headChamfer redefined
Spring-type straight pins - Slotted, heavy duty14812875287521998-03Spring-type straight pins - Slotted, heavy dutySpecification "non-jamming" included; chamfer redefined; partial change of dimensions
Parallel pins, Hardened; Tolerance Zone m663252873487341998-03Parallel pins of hardened and martensitic stainless steel (Dowel pins)Some other nominal lengths defined
High-strength hexagon head bolts with large widths across flats for structural steel bolting691414399-474122006-06High-strength structural bolting assemblies for preloading - Part 4: System HV - Hexagon bolt and nut assemblies 
High-strength hexagon nuts with large widths across flats for structural steel bolting691514399-4 2006-06High-strength structural bolting assemblies for preloading - Part 4: System HV - Hexagon bolt and nut assemblies 
Washers for high tensile bolting in steel structures691614399-674162006-06High-strength structural bolting assemblies for preloading - Part 6: Plain chamfered washers 
Hexagon flange bolts6921166581021998-11Hexagon bolts with flange, heavy seriesDimensions partially changed; width across flats according to ISO 272; strength 12.9 omitted
Hexagon nuts with flange6923166141611998-02Hexagon nuts with flangeFine thread omitted to be included in a separate standard later); width across flat M10 changed
Prevailing torque type hexagon nuts with non-metallic insert69242704070401998-02Prevailing torque type hexagon nuts (with non-metallic insert), style 1 - Property classes 5, 8 and 10Height of nut changed; width across flat according to ISO 272 included
Prevailing torque type hexagon nuts with non-metallic insert692430512105121998-02Prevailing torque type hexagon nuts (with non-metallic insert), style 1, with metric fine pitch thread - Property classes 6, 8 and 10Height of nut changed; width across flat according to ISO 272 included
Prevailing torque type all-metal hexagon nuts69252704270421998-02Prevailing torque type (all-metal hexagon nuts), style 2 - Property classes 5, 8, 10 and 12Height of nut changed; width across flat according to ISO 272 included
Prevailing torque type all-metal hexagon nuts692530513105131998-02Prevailing torque type all-metal hexagon nuts, style 2, with metric fine pitch thread - Property classes 8, 10 and 12Height of nut changed; width across flat according to ISO 272 included
Prevailing torque type hexagon nuts with flange (with non-metallic insert), with metric fine pitch thread69261666121251998-02Prevailing torque type hexagon nuts with flange (with non-metallic insert), with metric fine pitch threadWidth across flat M10 changed
Prevailing torque type - All-metal hexagon nuts with flange6927166470441998-02Prevailing torque type - All-metal hexagon nuts with flangeWidth across flat M10 changed
Spring-type straight pins - Coiled, standard duty73432875087502007-06Spring-type straight pins - Coiled, standard dutyRange of nominal diameters and lengths extended. Shear range changed.
Spring-type straight pins - Coiled, heavy duty73442874887482007-06Spring-type straight pins - Coiled, heavy dutyRange of nominal diameters and lengths extended. Shear range changed.
Spring-type straight pins, slotted, light duty7346 33372009-10Spring-type straight pins - Slotted, light dutySpecification "non-jamming" included; chamfer redefined; partial change of dimensions
Drilling screws with tapping screw thread - Mechanical and functional properties7504 106662000-02Drilling screws with tapping screw thread - Mechanical and functional propertiesStandard divided into five single standards (EN ISO 10666, 15480, 15481, 15482, 15483); thread ST 3.9 omitted; hexagon head with collar and slot (Form L) omitted
Hexagon washers head drilling screws with tapping screw thread7504 154802000-02Hexagon washers head drilling screws with tapping screw threadStandard divided into five single standards (EN ISO 10666, 15480, 15481, 15482, 15483); thread ST 3,9 omitted; hexagon head with collar and slot (Form L) omitted
Cross recessed pan head drilling screws with tapping screw thread7504 154812000-02Cross recessed pan head drilling screws with tapping screw threadStandard divided into five single standards (EN ISO 10666, 15480, 15481, 15482, 15483); thread ST 3.9 omitted; hexagon head with collar and slot (Form L) omitted
Cross recessed countersunk head drilling screws with tapping screw thread7504 154822000-02Cross recessed countersunk head drilling screws with tapping screw threadStandard divided into five single standards (EN ISO 10666, 15480, 15481, 15482, 15483); thread ST 3.9 omitted; hexagon head with collar and slot (Form L) omitted
Cross recessed raised countersunk head drilling screws with tapping screw thread7504 154832000-02Cross recessed raised countersunk head drilling screws with tapping screw threadStandard divided into five single standards (EN ISO 10666, 15480, 15481, 15482, 15483); thread ST 3.9 omitted; hexagon head with collar and slot (Form L) omitted
Slotted set screws with cup point7976 14791990-08Hexagon head tapping screwsNo modifications of dimensions
Unhardened taper pins with external thread79772873787371992-10Unhardened taper pins with external threadTechnical delivery conditions partially changed
Unhardened taper pins with internal thread79782873687361992-10Unhardened taper pins with internal threadDimensions partially changed
Parallel pins with internal thread, of unhardened and austenitic stainless steel79792873387331998-03Parallel pins with internal thread, of unhardened and austenitic stainless steelDimensions partially changed
Parallel pins with internal thread79792873587351998-03Parallel pins with internal thread, of hardened and martensitic stainless steelDimensions partially changed
Cross recessed pan head tapping screws7981 70491990-08Cross recessed pan head tapping screwsMarginal change of head dimensions. Caution with automatic feed and connection systems
Countersunk (flat) head tapping screws with cross recess7982 70501990-08Cross recessed countersunk (flat) head tapping screws (common head style)Head dimensions and countersunk angles changed
Raised countersunk (oval) head; tapping screws with cross recess7983 70511990-08Cross recessed raised countersunk (oval) head tapping screwsHead dimensions and countersunk angles changed
Recessed raised cheese (fillister) head screws7985 70451994-10Pan head screws with type H or type Z cross recess - product grade ANominal size changed; head dimension changed; thread length changed; penetration depth of cross slots changed
Hexagon socket countersunk head screws7991 104622004-06Hexagon socket countersunk head screws 
Washers; outside diameter ˜ 3 x bolt diameter9021 7093-12000-11Plain washers - Large series - Part 1: Product grade ADimensions partially changed
Washers; outside diameter approx. 3 x bolt diameter9021 7093-22000-11Plain washers - Large series - Part 2: Product grade CDimensions partially change
Product grade A washers with a hardness up to 250 HV, designed for use with hexagon head bolts and nuts125-1 70892000-11Plain washers - Normal series, Product grade AWithout chamfer, up to nominal diameter 64
Product grade A washers with a hardness up to 250 HV, designed for use with hexagon head bolts and nuts125-1 70901990-03Plain washers, chamfered - Normal series, Product grade AWithout chamfer, up to nominal diameter 64
Product grade A washers with a hardness from 300 HV, designed for use with hexagon head bolts and nuts125-2 70892000-11Plain washers - Normal series, Product grade AWithout chamfer, up to nominal diameter 64
Product grade A washers with a hardness from 300 HV, designed for use with hexagon head bolts and nuts125-2 70901990-03Plain washers, chamfered - Normal series, Product grade AWithout chamfer, up to nominal diameter 64
Product grade A washers with a hardness up to 250 HV, designed for use with cheese head screws433-1 70922000-11Plain washers - Small series, Product grade APyramid diamond hardness 140 HV cancelled; rating changed
Product grade A washers with a hardness up to 300 HV, designed for use with cheese head screws433-2 70922000-11Plain washers - Small series, Product grade ANominal sizes changed
Hexagon thin nuts with M 1,6 to M 10 threads439-12403640362001-02Hexagon thin nuts (unchamfered) - Product grade BCorrelation of dimensions with DIN 439-1, except for the width across flat of the nut M10
Hexagon thin nuts with M 1,6 to M 52 and M 8x1 to M 52x3 threads439-22403540352001-03Hexagon thin nuts (unchamfered) - Product grades A and BIn tables 1 and 2 abbreviations changed and some specifications (thread dimensions) changed
Hexagon thin nuts with M 1,6 to M 52 and M 8x1 to M 52x3 threads439-22403540352001-03Hexagon thin nuts (unchamfered) - Product grades A and BStandard divided by regular type screw threads and fine threads; width across flats according to ISO 272 changed; nominal size range changed; fine thread see ISO 8675
Hexagon thin nuts with M 1,6 to M 52 and M 8x1 to M 52x3 threads439-22867586752001-03Hexagon thin nuts (unchamfered) with metric fine pitch thread - Product grades A and BStandard divided by regular type screw threads and fine threads; width across flats according to ISO 272 changed; nominal size range changed; regular type screw thread see ISO 4035
Thread rolling screws for ISO metric thread - Part 1: Technical specifications for case hardened and tempered screws7500-1  2009-06Thread rolling screws for ISO-metric threadNormative revision, values for case-hardening depth and hole size revised, torque values reduced
Hexagon head bolts with shank; M 1,6 to M 39 screw threads, Product grades A and B931-12401440142001-03Hexagon head bolts - Product grades A and BNominal size extended; width across flats according to DIN ISO 272 included