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UNC - 8UN   Unified Thread Standard

UNC-8UN threading is measured in inches (1"=25,4mm), and was created and mainly used in the United States and in Canada. 

Similarly to the ISO Metric system, it has a 60° angle between each crest and each groove, but the diameters and heights of the crests are measured in inch fractions rather than millimetres.



2018 - 1B Lifting Eye Bolts DIN 580 UNC


2018 - 1D Lifting Eye Bolts DIN 580 8UN
2018 - AVVERTENZE WLL EN 2018.jpg




In accordance with standards DIN 580:2018 and DIN 582:2018, the carbon steel used for the construction of lifting eye bolts and lifting eye nuts is aluminium killed steel C15E (EN 10084/98).

A2 (AISI 304) or A4 (AISI 304)  stainless steel is also used for the construction of lifting eye bolts and lifting eye nuts.  Other materials can be employed for special applications. 




Non-machined lifting eye bolts and lifting eye nuts are usually supplied as semi-finished forged pieces (sand-blasted).

White zinc-plated lifting eye bolts and lifting eye nuts (minimum 8 microns) and hot-dip galvanised lifting eye bolts and lifting eye nuts (minimum 78 microns) are also ready for immediate delivery. 
Other surface treatments are available on request (yellow zinc-plating, dacromet, Delta Protekt, Delta Tone, Delta Seal, painting etc.).


These eye bolts with special threading are not included in standard DIN 580:2018 and cannot therefore be marketed as DIN 580:2018.

For this reason we have created a table named MWLEB580 (Mec Wolf Lifting Eye Bolts) by adopting the sizes of standard DIN 580 eye bolts’ unfinished bodies after machining with special threading.


For these products we guarantee the same mandatory requirements provided for by standard DIN 580:2018 and by the Machinery Directive 2006/42/CE; these products must therefore be considered to be perfectly compatible with standard DIN 580 and compliant with the Machinery Directive EN/2006/42.


Click here to view the mandatory requirements for the marketing and use of eye bolts and eye nuts.

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