We offer stainless M5 machine screws for attaching round bar holders to newel posts and attaching stainless handrails to stainless handrail support saddles. The machine screws are M5 x 0.8 x 25mm in size. For interior use, we recommend Grade A2 stainless steel, and for exterior use, we recommend Grade 316 stainless steel for its enhanced corrosion resistance. These machine screws provide a secure and durable fastening solution for your applications.