As　a　type　of　fastener,　swage-locking　pins　have　demonstrated　remarkable　performance　and　widespread　utilisation　across　aviation,　aerospace,　and　railway　industries.　As　the　variety　of　swage-locking　pin　products　continues　to　expand,　the　production　of　larger-sized　pins　with　different　materials　has　become　feasible.　Consequently,　these　pins　can　be　effectively　employed　in　stainless　steel　structures　in　civil　engineering　construction　as　an　alternative　to　high-strength　bolts,　effectively　mitigating　the　challenges　associated　with　stainless　steel　high-strength　bolts.　In　this　study,　stainless　steel　short　tail　swage-locking　pins　were　fabricated　and　tested　to　assess　their　applicability　in　stainless　steel　structures　as　a　viable　substitute　for　M20　high-strength　bolts.　Specifically,　the　mechanical　properties　of　the　raw　material　of　the　stainless　steel　swage-locking　pins　were　tested.　The　preload　level　of　the　swage-locking　pins　was　measured,　and　negligible　relaxation　in　preload　over　time　was　observed.　The　average　preload　value　achieved　met　the　requirements　for　M20　high-strength　bolts.　The　bearing　capacity　of　the　swage-locking　pins　under　tension　and　shear　was　measured,　and　a　bearing　capacity　design　equation　was　proposed.　Furthermore,　a　principle　for　the　pin　group　installation　sequence　was　proposed　and　the　relaxation　of　the　preload　under　this　principle　was　measured.　In　conclusion,　this　study　offers　valuable　insights　and　references　for　the　seamless　integration　of　stainless　steel　high-strength　short　tail　swage-locking　pins　within　stainless　steel　structures.