Sinews of SteelDramaSinews of SteelDramathumb_upthumb_downSinews of SteelApril 4, 1927Directed byFrank O'ConnorSinews of Steel is a 1927 American silent drama film directed by Frank O'Connor.US content warning Last Updated: January 6, 2026 Request Update CastAlberta VaughnHelen BlakeGaston GlassRobert McNeil Jr.Anders RandolfRobert McNeil Sr.Paul WeigelJan Van Der VetterGreta von RueElsie GrahamNora HaydenMartha JenkinsCharles WellesleyDouglas GrahamJohn H. GardenerElmer PriceRobert GordonThe Office Boy