Heavy Duty Steel Railroad Spike – Classic Rail Track Fastener Rail Spike 5/8"x6" Q235 As a foundational and indispensable component of railway fastening systems, our Rail Spike (Dog Spike) is a time-tested, high-reliability fastening solution trusted by railway operators worldwide for conventional rail, industrial lines, freight networks and regional branch construction. Engineered to comply with ASTM A65 and international railway industry standards, our dog spikes feature a