Common Interchangeable DIN / ISO Fasteners substitutions

Below is a description of common Metric Fasteners with their DIN classification numbers and the ISO equivalents. These are readily interchangeable.

Description DIN  ISO Equivalent
Cross Recessed Pan Head Screw DIN 7985 ISO 7045
Socket Head Cap Screw, Coarse Thread DIN 912 ISO 4762
Socket Head Cap Screw, Fine Thread DIN 912 ISO 12474
Socket Set Screw – Flat Point DIN 913 ISO 4026
Socket Set Screw – Cone Point DIN 914 ISO 4027
Socket Set Screw – Dog Point DIN 915 ISO 4028
Socket Set Screw – Cup Point DIN 916 ISO 4029
Slotted Set Screw – Long Dog Point DIN 417 DIN EN 27435
Slotted Set Screw – Cup Point DIN 438 DIN EN 27436
Slotted Set Screw – Flat Point DIN 551 ISO 4766
Slotted Set Screw – Cone Point DIN 553 ISO 7434
Slotted Headless Screw with Shank DIN 427 ISO 2342
Hex Head Bolts, (FT) Metric Coarse  DIN 558 ISO 4018
Hex Head Bolts, (PT) Metric Coarse DIN 601 ISO 4016
Hex Head Bolts, (PT) Metric Coarse DIN 931 ISO 4014
Hex Head Bolts, (FT) Metric Coarse DIN 933 ISO 4017
Hex Head Bolts, (PT) Metric Fine DIN 960 ISO 8765
Hex Head Bolts, (FT) Metric Fine DIN 961 ISO 8676
Hex Nut – Thin DIN 439 ISO 4035, 4036
Hex Nut – Thin (Chamfered) Fine DIN 439 ISO 8675
Hex Nut with Flange DIN 6923 DIN EN 1661
Hex Weld Nut with Flange DIN 977 ISO 21670
Washer, Plain DIN 125 ISO 7089, 7090
Washer, Plain Small DIN 433 ISO 7092
Washer, Plain Large DIN 9021 ISO 7093

Similar, but with minor changes from DIN to ISO

These are similar, but not identical from DIN to ISO. Some slight differences include head heights, head width.  These should be interchangeable for most situations.

Slotted Cheese Head Screw DIN 84 ISO 1207
Slotted Flat Head (Countersunk) Screw DIN 963 ISO 2009
Slotted Raised Countersunk Head screws DIN 964 ISO 2010
Cross Recessed Flat Head (Countersunk) DIN 965 ISO 7046
Cross Recessed Raised Countersunk Head DIN 966 ISO 7047
Flat Head (Countersunk) Socket Cap DIN 7991 ISO 10642
Hex Head Bolts w Flange DIN 6921 DIN EN 1665
Hex Head Self-Tapping Screws DIN 7976 ISO 1479
Cross Recessed Pan Head Tapping screw DIN 7981 ISO 7049
Cross Recessed Flat Head Tapping screw DIN 7982 ISO 7050
Cross Recessed Raised Countersunk Head DIN 7983 ISO 7051
Hex Nut – Thin (Unchamfered) DIN 439 ISO 4036
Hex Nut, Prevailing Torque Flange DIN 6926 DIN EN 1663, 1666
Hex Nut, Prevailing Torque Flange  DIN 6927 DIN EN 1664, 1667
Hex Nut, Prevailing Torque All-Metal DIN 980, 6925 ISO 7042, 10513
Hex Nut, Prevailing Torque, Nylon Insert DIN 982, 6924 ISO 7040, 10512
Hex Nut, Prevailing Torque, Nylon Insert DIN 985 ISO 10511