Up to locknut size MSW 70.46, axial pretension is set using the pretension moment of the locknut itself. Locknuts are produced in steel, tempered and burnished. The metric ISO thread is manufactured to the tolerance class "fine" (tolerance dass 5H, DIN 13, parts 21- 25) in a single work process with the end face of the locknut. 
 

Locknut execution (Fig.1)

Grooves designed to accommodate a DIN 1810 form A sickle spanner are provided for the screwing on and pretensioning this locknut size. The integrated clamping screws are cheese-head screws to ISO4762 (DIN912).

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