The spreadsheet is a design tool both for fast and detailed calculation for the verification of general metric thread of a screw application. It allows to specify a specific diameter for the screw, in order to coveralso special cases as for example thread realized on shafts. The following sections are reported in the calculation: Verification under the applied loads Thread stripping strength verification Verification at applied loads as per Eurocode 3 - EN 1993-1-8:2005 Verification during the tightening operation