The　conventional　surface　treatments　on　stainless　steel　plates　yield　slip　factors　less　than　the　required　value　for　a　friction　grip,　which　hinders　the　application　of　stainless　steel　high-strength　bolts.　The　slip　factor　and　the　treatment　process　of　stainless　steel　surfaces　are　not　clearly　specified　in　most　of　the　existing　design　codes.　Existing　studies　also　show　different　slip　factors　from　similarly　treated　surfaces.　In　this　paper,　a　new　surface　treatment　is　proposed:　the　two　touching　surfaces　of　the　bolted　connection　are　grit-blasted　on　one　side　and　coated　with　high-velocity　oxygen　fuel　(HVOF)　on　the　other　side.　The　slip　behaviour　of　the　new　method　was　compared　with　four　conventional　methods.　The　roughness　and　hardness　of　different　surfaces　were　measured　prior　to　a　total　of　30　slip　tests　where　the　slip　factors　of　multiple　stainless　steel　surfaces　were　tested.　It　was　shown　that　the　new　proposed　surface　treatment　method　can　yield　a　slip　factor　of　0.61,　much　higher　than　the　conventional　surface　treatments,　meeting　the　requirements　as　a　slip-resistant　connection.　The　preload　relaxation　of　stainless　steel　high-strength　bolts　was　also　monitored　and　compared　to　standard　grade　10.9　high-strength　bolts.　We　found　that　the　preload　relaxation　in　stainless　steel　high-strength　bolts　is　negligible.　©　2022　by　the　authors.