ISO 10684 Specification
Calculation of minimum ultimate tensile loads and proof loads for bolts and screws M8 and M10 with threads undersized to tolerance class 6az
The minimum ultimate tensile loads given in Table A.3 and the minimum proof loads given in
Table A.4 have been calculated using the minimum tensile strength, Rm, and the stress under
proof load, Sp' as specified in ISO 898-1. These values are multiplied by the stress area,
Asaz' derived from the thread diameters for M 10 in accordance with ISO 965-4 and for M8 in
accordance with Annex B and the following formula:
Where:
d2 is the maximum pitch diameter of the thread;
d3is the maximum minor diameter of the thread.