ISO / DIN / BS STANDARDS EXPLAINED
DIN is the acronym for ‘Deutsches Institut für Normung’, which is the ‘German institute for standardisation’ who developed detailed technical standards for the engineering industry, amongst many other industries. With reference to fasteners, DIN number indicates the that the part conforms to a specific metric standard.
The International Standards Organisation (ISO) standard has evolved to supersede the DIN standard, which was historically the predominant metric fastener system referred to. The intention of the ISO standard was to standardise the technical specifications worldwide to simplify the system and aid the flow of trade via a universally recognised standard.
In practice, DIN and ISO standards are still both commonly used when specifying fasteners and both standards are recognised by Technifast when our customers specify the fasteners they require.
The chart below shows the ISO standards and their equivalent DIN and BS standards.
||EQUIVALENT BRITISH STANDARD (BS)
||EQUIVALENT DIN STANDARD
||Extractable Taper Pins
||Grooved Pins (Full Length Parallel Groove)
||Grooved Pins (Half Length Reverse Taper Groove)
||Grooved Pins (Third Length Centre Groove)
||Grooved Pins (Half Length Centre Groove)
||Grooved Pins (Full Length Taper Groove)
||Grooved Pins (Half Length Taper Groove)
||Grooved Pins Headed (Round)
||Grooved Pins Headed (Countersunk)
||Coiled Pins (Heavy Duty)
||Standard Specifying Shear Testing
||Coiled Pins (Standard Duty)
||Coiled Pins (Light Duty)
||Slotted Pins (Heavy Duty)
||Slotted Pins (Light Duty)
*These refer to plus related standards which are available to special order, please contact us for details.
It should be noted that the BS and DIN standards shown are rarely identical to each other or to the ISO standards but are considered as equivalent.