The　lack　of　product　specification　of　stainless　steel　high-strength　bolts　has　restricted　the　application　of　high-strength　bolts　in　stainless　steel　structures.　Existing　studies　have　found　that　stainless　steel　bolts　experience　thread　galling　during　the　tightening　procedure,　making　it　impossible　to　apply　preload.　Different　studies　have　obtained　different　torque　coefficient　values.　In　this　paper,　a　series　of　tests　were　carried　out　on　two　types　of　grade　10.9　stainless　steel　high-strength　bolts　and　two　types　of　ordinary　stainless　steel　bolts,　and　the　tensile　strength,　shear　strength,　hardness　and　preload　level　were　obtained.　The　results　show　that　the　yield　strength,　tensile　strength　and　elongation　after　break　of　the　new　stainless　steel　high-strength　bolts　can　reach　1122　MPa,　1147　MPa　and　16.3%　respectively,　proving　that　the　grade　10.9　stainless　steel　high-strength　bolts　meet　the　requirements　of　the　conventional　grade　10.9　high-strength　bolts.　Tightening　tests　on　stainless　steel　bolts　with　lubricant　were　carried　out　and　it　was　found　that　the　friction-reducing　lubrication　effect　was　related　to　the　curing　time　of　the　lubricant.　The　lubricant　Molykote　D-321R　Spray　was　found　to　be　more　effective　in　reducing　friction　and　preventing　thread　galling　in　stainless　steel　bolts.　With　the　optimum　curing　time　at　room　temperature　of　12　h,　the　lubricant　can　reduce　the　torque　coefficient　to　about　0.080,　meeting　the　torque　coefficient　limit　for　high-strength　bolts.　In　the　end,　the　preload　level,　torque　coefficient　and　torque　level　for　construction　for　stainless　steel　high-strength　bolts　are　recommended　for　engineering　applications.　©　2023