Hexagon nuts DIN 555-polyamide 6.6 M20

The wrench sizes for hexagon bolts and nuts are specified in ISO 272: 1982-01. The nominal wrench size on the workpiece (e.g. bolt, nut) is the same as that on the tool. However, there is some play between the two to allow the tool to be fitted without difficulty. The relationship between the nominal diameter d of the thread and the wrench size s is standardised in EN ISO 4014 and EN ISO 4017 for hexagon bolts, and in EN ISO 4032 for hexagon nuts (dimensions in mm).

Polyamide is a thermoplastic and therefore has long, thread-like macromolecules that have no mutual crosslinking points. PA is milky white, has a slippery and abrasion-resistant surface, is resistant to chemicals and solvents, and is hard and tough. Various standards regulate mechanical connecting elements made of plastic (screws, nuts, washers), such as: B. DIN EN 34810, DIN 34811, DIN 34812, DIN 34813, DIN 34814, DIN 34815 and DIN 34816 their properties.