Transition form DIN Standards to ISO Standards and EN Standards

 

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General

What is standardization?

Standards are technical rules. Everybody can use those technical rules. In Germany, DIN (Deutsches Institut für Normung e.V., German Institute for Standardization) publishes and updates the valid standards. The institute is based in Berlin and administers about 29,500 DIN standards, more than 386 of whom apply to mechanical fasteners.

DIN has about 1,745 members pertaining to the different sectors of industry, craft, trade, science and services. More than 26,278 experts of the interested parties work for DIN.

The standards are developed by working groups. Draft standards are made available to all interested parties and after a period for objection published as valid standards.

To simplify the international movement of goods and to remove trade barriers, national standards are replaced with international standards.

This results in international standard definitions and descriptions, the quality standard is standardised on a high level and movement of products can be realised worldwide.

ISO, the "International Organization for Standardization" based in Geneva is responsible for standardization on an international level. More than 157 countries are members of that organisation. The results of the work are published under the name of "ISO".

Many ISO standards are adopted as European standards and thus acquire the status of a DIN standard (DIN EN ISO). Some ISO standards are directly adopted as DIN standards (DIN ISO).

Due to the obligation to adopt, the 29 members of the European Committee for Standardisation (CEN) adopt European standards into the corresponding national bodies of standards. Conflicting national standards are withdrawn.

What kind of standards are there?

DIN German national standard
ISO international standard
DIN ISO German edition of an unaltered ISO standard
EN European standard
DIN EN German edition of a European standard
EN ISO European edition of an unaltered ISO standard
DIN EN ISO German edition of an EN ISO standard

What has changed?

  • Withdrawal of DIN standards without replacement, particularly with respect to locking elements
  • Changed widths across flats for hexagon screws
  • Changed height for hexagon nuts
  • Changes in standards for threaded screws and sheet metal screws
  • Changes in standards for bolts, pins, headless pins and washers for bolts
  • Changed countersink angle for countersunk head screws

Further information is provided on the tab opposite and in "The Manual of Fastening Technology".

Comparison of revised standards

Title DIN Standard DIN DIN EN ISO DIN EN DIN ISO Comparable ISO Standard Date of current standard/modified Title of replacement standard Comment
All-metal prevailing torque type hexagon nuts (980) 7042 27042 7042 1998-02 Prevailing torque type (all-metal hexagon nuts), style 2 - Property classes 5, 8, 10 and 12 Height of nut changed; width across flat according to ISO 272 included
All-metal prevailing torque type hexagon nuts (980) 10513 30513 10513 1998-02 Prevailing torque type all-metal hexagon nuts, style 2, with metric fine pitch thread - Property classes 8, 10 and 12 Height of nut changed; width across flat according to ISO 272 included
Clevis pins with head (1434) 22341 2341 1992-10 Clevis pins with head Only one head dimension. Partially other nominal lengths defined.
Clevis pins with head (1435) 22341 2341 1992-10 Clevis pins with head Only one head dimension. Partially other nominal lengths defined.
Clevis pins with head (1436) 22341 2341 1992-10 Clevis pins with head Only one head dimension. Partially other nominal lengths defined.
Clevis pins with head (1444) 22341 2341 1992-10 Clevis pins with head Some other nominal lengths defined
Clevis pins without head (1433) 22340 2340 1992-10 Clevis pins without head Some other nominal lengths defined
Clevis pins without head (1443) 22340 2340 1992-10 Clevis pins without head
Countersunk (flat) head tapping screws with cross recess (7982) 7050 7050 1990-08 Cross recessed countersunk (flat) head tapping screws (common head style) Head dimensions and countersunk angles changed
Cross recessed countersunk (flat) head screws (Countersunk heads according to ISO) (965) 7046-1 (7046) 7046-1 1994-10 Countersunk flat head screws (common head style) with type H or type Z cross recess - Property class 4.8 Nominal 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) 7047 (7047) 7047 1994-10 Countersunk raised head screws (common head style) with type H or type Z cross recess - Product grade A Nominal size changed; head dimension changed; thread length changed; strength 8.8 omitted; penetration depth of cross slots changed
Cross recessed countersunk head drilling screws with tapping screw thread (7504) 15482 15482 2000-02 Cross recessed countersunk head drilling screws with tapping screw thread Standard 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 thread (7504) 15481 15481 2000-02 Cross recessed pan head drilling screws with tapping screw thread Standard 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 tapping screws (7981) 7049 7049 1990-08 Cross recessed pan head tapping screws Marginal change of head dimensions. Caution with automatic feed and connection systems
Cross recessed raised countersunk head drilling screws with tapping screw thread (7504) 15483 15483 2000-02 Cross recessed raised countersunk head drilling screws with tapping screw thread Standard 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
Drilling screws with tapping screw thread - Mechanical and functional properties (7504) 10666 10666 2000-02 Drilling screws with tapping screw thread - Mechanical and functional properties Standard 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
Grooved pins - Full-length parallel grooved, with chamfer (1473) 8740 (28740) 8740 1998-03 Grooved pins - Full-length parallel grooved, with chamfer Nominal lengths redefined. Shear rate increased.
Grooved pins - Fulllength parallel grooved, with pilot (1470) 8739 (28739) 8739 1998-03 Grooved pins - Full-length parallel grooved, with pilot Nominal lengths redefined. Shear rate increased.
Grooved pins - Fulllength taper grooved (1471) 8744 (28744) 8744 1998-03 Grooved pins - Full-length taper grooved Nominal lengths redefined. Shear rate increased.
Grooved pins - Half-length reverse-taper grooved (1474) 8741 (28741) 8741 1998-03 Grooved pins - Half-length reverse-taper grooved Nominal lengths redefined. Shear rate increased.
Grooved pins - Half-length taper grooved (1472) 8745 (28745) 8745 1998-03 Grooved pins - Half-length taper grooved Nominal lengths redefined. Shear rate increased.
Grooved pins - One-third-length centre grooved (1475) 8742 (28742) 8742 1998-03 Grooved pins - One-third-length centre grooved Nominal lengths redefined. Shear rate increased.
Grooved pins with countersunk head (1477) 8747 (28747) 8747 1998-03 Grooved pins with countersunk head Chamfer redefined
Grooved pins with round head (1476) 8746 (28746) 8746 1998-03 Grooved pins with round head Chamfer redefined
Hexagon Bolts without Hexagon Nut - with Hexagon Nut, Type g (601) 4016 (24016) 4016 (4016 ) 2001-03 Hexagon head bolts - Product grade C Nominal size extended; width across flats according to DIN ISO 272 included
Hexagon bolts, Metric fine thread, Types m and mg (960) 8765 (28765) 8765 (8765 ) 2001-03 Hexagon thin nuts (chamfered) with metric fine pitch thread - Product grades A and B Nominal size extended; width across flats according to DIN ISO 272 included
Hexagon flange bolts (6921) 1665 8102 1998-11 Hexagon bolts with flange, heavy series Dimensions partially changed; width across flats according to ISO 272; strength 12.9 omitted
Hexagon head bolts with shank; M 1,6 to M 39 screw threads, Product grades A and B (931-1) 4014 (24014) 4014 (4014 ) 2001-03 Hexagon head bolts - Product grades A and B Nominal size extended; width across flats according to DIN ISO 272 included
Hexagon head screws - Product grades A and B (933) 4017 (24017) 4017 (4017 ) 2001-03 Hexagon head screws - Product grades A and B Nominal size extended; width across flats according to DIN ISO 272 included
Hexagon nuts with flange (6923) 1661 4161 1998-02 Hexagon nuts with flange Fine thread omitted to be included in a separate standard later); width across flat M 10 changed
Hexagon nuts; Metric Thread, Type g (555) 4034 (24034) 4034 (4034 ) 2001-03 Hexagon nuts - Product grade C Width across flats according to DIN ISO 272 included; nominal diameter reduced
Hexagon nuts; Metric screw threads; Product grades A and B (934) 4032 (24032) 4032 (4032 ) 2001-03 Hexagon nuts, style 1 - Product grades A and B Nominal 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 B (934) 8673 (28673) (8673 ) 2001-03 Hexagon nuts, style 1, with metric fine pitch thread - Product grades A and B Nominal 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 screws, Thread Approximately to Head, Metric Thread, Type g (558) 4018 (24018) 4018 (4018 ) 2001-03 Hexagon head screws - Product grade C Nominal size extended; width across flats according to DIN ISO 272 included
Hexagon socket countersunk head screws (7991) 10642 10462 2004-06 (z1998- Hexagon socket countersunk head screws
Hexagon socket head cap screws (912) 4762 4762 2004-06 Hexagon socket head cap screws Nominal size range changed; fine thread deleted (siehe ISO 21269)
Hexagon socket set screws with cone point (914) 4027 4027 2004-05 Hexagon socket set screws with cone point Nominal sizes M 1,4, M 1,8, M 14, M 18 and M 22 omitted
Hexagon socket set screws with cup point (916) 4029 4029 2004-05 Hexagon socket set screws with cup point
Hexagon socket set screws with dog point (915) 4028 4028 2004-05 Hexagon socket set screws with dog point Nominal sizes M 1,4, M 1,8, M 14, M 18 and M 22 omitted
Hexagon socket set screws with flat point (913) 4026 4026 2004-05 Hexagon socket set screws with flat point Nominal sizes M 1,4, M 1,8, M 14, M 18 and M 22 omitted
Hexagon thin nuts with M 1,6 to M 10 threads (439-1) 4036 (24036) 4036 (4036 ) 2001-02 Hexagon thin nuts (unchamfered) - Product grade B Correlation of dimensions with DIN 439-1, except for the width across flat of the nut M 10
Hexagon thin nuts with M 1,6 to M 52 and M 8x1 to M 52x3 threads (439-2) 4035 (24035) 4035 2001-03 Hexagon thin nuts (unchamfered) - Product grades A and B In 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 threads (439-2) 4035 (24035) 4035 (4035 ) 2001-03 Hexagon thin nuts (unchamfered) - Product grades A and B Standard 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 threads (439-2) 8675 (28675) (8675 ) 2001-03 Hexagon thin nuts (unchamfered) with metric fine pitch thread - Product grades A and B Standard 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
Hexagon washers head drilling screws with tapping screw thread (7504) 15480 15480 2000-02 Hexagon washers head drilling screws with tapping screw thread Standard 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
High-strength hexagon head bolts with large widths across flats for structural steel bolting (6914) 14399-4 7412 2006-06 High-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 bolting (6915) 14399-4 2006-06 High-strength structural bolting assemblies for preloading - Part 4: System HV - Hexagon bolt and nut assemblies
M 8x1 to M 100x4 hexagon head bolts with fine pitch thread (961) 8676 (28676) 8676 (8676 ) 2001-03 Hexagon head screws with metric fine pitch thread - Product grades A and B Nominal size extended; width across flats according to DIN ISO 272 included
Mushroom head square neck bolts 603 8677 1981-10
Parallel pins of unhardened steel and austenitic stainless steel (7) 2338 (22338) 2338 1998-02 Parallel pins of unhardened steel and austenitic stainless steel Nominal length redefined (with round end) form A+C deleted
Parallel pins with internal thread (7979) 8735 (28735) 8735 1998-03 Parallel pins with internal thread, of hardened and martensitic stainless steel Dimensions partially changed
Parallel pins with internal thread, of unhardened and austenitic stainless steel (7979) 8733 (28733) 8733 1998-03 Parallel pins with internal thread, of unhardened and austenitic stainless steel Dimensions partially changed
Parallel pins, Hardened; Tolerance Zone m6 (6325) 8734 (28734) 8734 1998-03 Parallel pins of hardened and martensitic stainless steel (Dowel pins) Some other nominal lengths defined
Plain washers - Extra large series, product grade C (440) 7094 7094 2000-12 Plain washers - Extra large series, product grade C Nominal sizes changed, nominal size 24 size "a" redefined to the maximum, square-end hole Form R omitted; (standard DIN 440 still valid)
Plain washers for clevis pins; product grade A (1440) 28738 8738 1992-10 Plain washers for clevis pins; product grade A Nominal sizes changed
Prevailing torque type - All-metal hexagon nuts with flange (6927) 1664 7044 1998-02 Prevailing torque type - All-metal hexagon nuts with flange Width across flat M 10 changed
Prevailing torque type all-metal hexagon nuts (6925) 7042 (27042) 7042 1998-02 Prevailing torque type (all-metal hexagon nuts), style 2 - Property classes 5, 8, 10 and 12 Height of nut changed; width across flat according to ISO 272 included
Prevailing torque type all-metal hexagon nuts (6925) 10513 (30513) 10513 1998-02 Prevailing torque type all-metal hexagon nuts, style 2, with metric fine pitch thread - Property classes 8, 10 and 12 Height 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 thread (6926) 1666 12125 1998-02 Prevailing torque type hexagon nuts with flange (with non-metallic insert), with metric fine pitch thread Width across flat M 10 changed
Prevailing torque type hexagon nuts with non-metallic insert (982) 7040 27040 7040 1998-02 Prevailing torque type hexagon nuts (with non-metallic insert), style 1 - Property classes 5, 8 and 10 Height of nut changed; width across flat according to ISO 272 included
Prevailing torque type hexagon nuts with non-metallic insert (982) 10512 30512 10512 1998-02 Prevailing torque type hexagon nuts (with non-metallic insert), style 1, with metric fine pitch thread - Property classes 6, 8 and 10 Height of nut changed; width across flat according to ISO 272 included
Prevailing torque type hexagon nuts with non-metallic insert (6924) 7040 (27040) 7040 1998-02 Prevailing torque type hexagon nuts (with non-metallic insert), style 1 - Property classes 5, 8 and 10 Height of nut changed; width across flat according to ISO 272 included
Prevailing torque type hexagon nuts with non-metallic insert (6924) 10512 (30512) 10512 1998-02 Prevailing torque type hexagon nuts (with non-metallic insert), style 1, with metric fine pitch thread - Property classes 6, 8 and 10 Height of nut changed; width across flat according to ISO 272 included
Prevailing torque type hexagon thin nuts with non-metallic insert (985) 10511 10511 1998-02 Prevailing torque type hexagon, thin nuts (with non-metallic insert) Height of nut changed; width across flat according to ISO 272 included
Product grade A washers with a hardness from 300 HV, designed for use with hexagon head bolts and nuts (125-2) 7089 7089 2000-11 Plain washers - Normal series, Product grade A Without chamfer, up to nominal diameter 64
Product grade A washers with a hardness from 300 HV, designed for use with hexagon head bolts and nuts (125-2) 7090 7090 1990-03 Plain washers, chamfered - Normal series, Product grade A Without chamfer, up to nominal diameter 64
Product grade A washers with a hardness up to 250 HV, designed for use with cheese head screws (433-1) 7092 7092 2000-11 Plain washers - Small series, Product grade A Pyramid diamond hardness 140 HV cancelled; rating changed
Product grade A washers with a hardness up to 250 HV, designed for use with hexagon head bolts and nuts (125-1) 7089 7089 2000-11 Plain washers - Normal series, Product grade A Without 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 nuts (125-1) 7090 7090 1990-03 Plain washers, chamfered - Normal series, Product grade A Without chamfer, up to nominal diameter 64
Product grade A washers with a hardness up to 300 HV, designed for use with cheese head screws (433-2) 7092 7092 2000-11 Plain washers - Small series, Product grade A Nominal sizes changed
Product grade C washers, designed for use with hexagon head bolts and nuts (126) 7091 7091 2000-11 Plain washers - Normal series, Product grade C Nominal sizes changed
Raised countersunk (oval) head; tapping screws with cross recess (7983) 7051 7051 1990-08 Cross recessed raised countersunk (oval) head tapping screws Head dimensions and countersunk angles changed
Recessed raised cheese (fillister) head screws (7985) 7045 7045 1994-10 Pan head screws with type H or type Z cross recess - product grade A Nominal size changed; head dimension changed; thread length changed; penetration depth of cross slots changed
Slotted cheese head screws - Product grade A (84) 1207 1207 1994-10 Slotted cheese head screws - Product grade A Modifications of dimensions < 2,5; dimension of slots changed; partly nominal lengths deleted; strength 8.8 deleted
Slotted countersunk (flat) head screws (Countersunk heads according to ISO) (963) 2009 (2009) 2009 1994-10 Slotted countersunk flat head screws (common head style) - Product grade A Nominal size changed; head dimension changed; thread length changed; strength 8.8 cancelled
Slotted headless screws with shank (427) 2342 2342 2004-05 Slotted headless screws with shank
Slotted pan head screws - Product grade A (85) 1580 1580 1994-10 Slotted pan head screws - Product grade A Thread included; dimensions of head and slot changed; strength 8.8 deleted
Slotted raised countersunk (oval) head screws (Countersunk heads according to ISO) (964) 2010 (2010) 2010 1994-10 Slotted raised countersunk head screws (common head style) - Product grade A Nominal size changed; head dimension changed; thread length changed; strength 8.8 cancelled
Slotted set screws with cone point (553) 27434 7434 1992-10 Slotted set screws with cone point No modifications of dimensions
Slotted set screws with cup point (7976) 1479 1479 1990-08 Hexagon head tapping screws No modifications of dimensions
Slotted set screws with flat point (551) 24766 4766 1992-10 Slotted set screws with flat point No modifications of dimensions
Slotted set screws with long dog point (94) 1234 1234 1998-02 Split pins No modifications of dimensions
Slotted set screws with long dog point (417) 27435 7435 1992-10 Slotted set screws with long dog point No modifications of dimensions
Spring-type straight pins - Coiled, heavy duty (7344) 8748 (28748) (8748) 8748 2007-06 Spring-type straight pins - Coiled, heavy duty Range of nominal diameters and lengths extended. Shear range changed.
Spring-type straight pins - Coiled, standard duty (7343) 8750 (28750) (8750) 8750 2007-06 Spring-type straight pins - Coiled, standard duty Range of nominal diameters and lengths extended. Shear range changed.
Spring-type straight pins - Slotted, heavy duty (1481) 8752 (28752) 8752 1998-03 Spring-type straight pins - Slotted, heavy duty Specification "non-jamming" included; chamfer redefined; partial change of dimensions
Spring-type straight pins, slotted, light duty (7346) 13337 3337 2009-10 Spring-type straight pins - Slotted, light duty Specification "non-jamming" included; chamfer redefined; partial change of dimensions
Thread rolling screws for ISO metric thread - Part 1: Technical specifications for case hardened and tempered screws 7500-1 (7085) 2009-06 Thread rolling screws for ISO-metric thread Normative revision, values for case-hardening depth and hole size revised, torque values reduced
Unhardened taper pins (1) 22339 2339 1992-10 Unhardened taper pins Nominal length redefined (with round end)
Unhardened taper pins with external thread (7977) 28737 8737 1992-10 Unhardened taper pins with external thread Technical delivery conditions partially changed
Unhardened taper pins with internal thread (7978) 28736 8736 1992-10 Unhardened taper pins with internal thread Dimensions partially changed
Washers for hightensile bolting in steel structures (6916) 14399-6 7416 2006-06 High-strength structural bolting assemblies for preloading - Part 6: Plain chamfered washers
Washers; outside diameter ˜ 3 x bolt diameter (9021) 7093-1 7093-1 2000-11 Plain washers - Large series - Part 1: Product grade A Dimensions partially changed
Washers; outside diameter ˜ 3 x bolt diameter (9021) 7093-2 7093-2 2000-11 Plain washers - Large series - Part 2: Product grade C Dimensions partially changed


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