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ISO 5855-1:1999

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Aerospace — MJ threads — Part 1: General requirements

This part of ISO 5855 specifies the general requirements for MJ threads used in aerospace construction.

It determines the basic triangular profile for this type of thread and gives a system for designating the diameter and

pitch combinations. For all diameters 1,6 mm to 300 mm, it offers in the form of tables the basic dimensions and

tolerances for a selection of diameter and pitch combinations. It also provides the method of calculation for the

dimensions and tolerances for any diameter and pitch combination not given in the tables, including threads with a

diameter in excess of 300 mm.

For limit dimensions for bolts and nuts of nominal diameter 1,6 mm to 39 mm, see ISO 5855-2. For limit dimensions for

fittings for fluid systems, see ISO 5855-3.

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