This is the Muffler Assembly Screw and Nut / for the O.S. F-5030 Silencer (OSMG6778). / / FEATURES: Black steel construction / / INCLUDES: One Phillips Head Screw w/nut / / REQUIRES: Installing through muffler / Thread locking compound GPMR6060 / / SPECS: Length: 97mm (3.82") / Diameter: 4mm (0.16")