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General Fastener Standards - BS Order
Note: The following table is provided for guidance only as there are often dimensional variations between standards.
| BRITISH STANDARD | DIN STANDARD | ISO STANDARD | TYPE OF FASTENER |
| BS EN ISO4026 | DIN913 | ISO4026 | Hex Socket Setscrew Flat point |
| BS EN ISO4027 | DIN914 | ISO4027 | Hex Socket Setscrew Cone point |
| BS EN ISO4028 | DIN915 | ISO4028 | Hex Socket Setscrew Dog point |
| BS EN ISO4029 | DIN916 | ISO4029 | Hex Socket Setscrew Plain Cup point |
| BS3692 | DIN931 | ISO4014 | Hexagon head bolt - part threaded |
| BS3692 | DIN933 | ISO4017 | Hexagon head setscrew – fully threaded |
| BS3692 | DIN934 | ISO4032 | Hexagon Full Nut |
| BS3692 | DIN439/936 | ISO4035 | Hexagon Lock Nut |
| BS4168 | DIN912 | ISO4762 | Hex Socket Cap |
| BS4168 | N/A | ISO7380 | Hex Socket Button |
| BS4168 | DIN7991 | ISO10642 | Hex Socket Countersunk |
| BS4174 AB | DIN7981CZ | ISO7049CZ | Self tapping pan recess pointed |
| BS4174 AB | DIN7982CZ | ISO7050CZ | Self tapping csk recess pointed |
| BS4174 AB | DIN7983CZ | ISO7051CZ | Self tapping raised csk recess pointed |
| BS4174 AB | N/A | N/A | Self tapping Flange recess pointed |
| BS4174 B | DIN7981FZ | ISO7049FZ | Self tapping pan recess blunt |
| BS4174 B | DIN7982FZ | ISO7050FZ | Self tapping csk recess blunt |
| BS4174 B | N/A | N/A | Self tapping Flange recess blunt |
| BS4174 B | DIN7971F | ISO1481F | Self tapping pan slotted blunt |
| BS4174 B | DIN7972F | ISO1482F | Self tapping csk slotted blunt |
| BS4174AB | DIN7971C | ISO1481C | Self tapping pan slotted pointed |
| BS4174AB | DIN7972C | ISO1482C | Self tapping csk slotted pointed |
| BS4174AB | DIN7983C | ISO1483C | Self tapping raised csk slotted pointed |
| BS4183 | DIN7985 | ISO7045 | Pan recess machine screw |
| BS4183 | DIN85 | ISO1580 | Pan slotted machine screw |
| BS4183 | DIN965 | ISO7046 | Countersunk recess machine screw |
| BS4183 | DIN963 | ISO2009 | Countersunk slotted machine screw |
| BS4183 | DIN84 | ISO1207 | Cheese Slotted machine screw |
| BS4183 | DIN966 | ISO7047 | Raised Csk Recess machine screw |
| BS4183 | DIN964 | ISO2010 | Raised Csk Slotted machine screw |
| BS4464A | DIN7980 | N/A | Square sect. single coil spring washer |
| BS4464B | DIN127 | N/A | Rectangular sect. single coil spring washer |
| N/A | DIN7981CH | ISO7049CH | Self tapping pan Phillips pointed |
| N/A | DIN7982CH | ISO7050CH | Self tapping csk Phillips pointed |
| N/A | DIN7983CH | ISO7051CH | Self tapping raised csk Phillips pointed |
| N/A | DIN7981FH | ISO7049FH | Self tapping pan phillips blunt |
| N/A | DIN6923 | ISO4161 | Hexagon Flange Nut |
| N/A | DIN928 | N/A | Square Weld Nut |
| N/A | DIN929 | N/A | Hexagon Weld Nut |
| N/A | DIN6797J | N/A | Toothed lock washer – internal |
| N/A | DIN6797A | N/A | Toothed lock washer – external |
Note: Due to the fact that fastening applications differ greatly, the above information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.
