ESDU 91008 provides data to determine the minimum load to cause failure by rupture or maximum permissible permanent deformation of parallel-sided and tapered lugs with round or square ends under axial loading. Consideration of the effects of pin bending in a double shear joint is also included. The data on axial failure apply to any metallic material. The data include empirical factors that are geometry and material dependent and are presented as curves. The theory on which their calculation is based is outlined. A Fortran computer program@ ESDUpac A9108@ is provided to determine the factors for lugs fabricated from any metallic material. The program requires input of the material characteristics and an elastic stress concentration factor that may be found from ESDU 81006. A complete lug strength analysis calculation is included to illustrate the use of the program and data. Information on the analysis of lugs under transverse and oblique loads is provided in ESDU 06021 and ESDU 08007 respectively.