This is the Muffler Assembly Screw for the OS Max #842 & #871 Mufflers / This assembly screw holds the muffler body together. / / FEATURES: Black Steel Construction / Round Phillips/slotted head type / / INCLUDES: One Assembly Screw / One 2.6mm nut / / SPECS: Assembly Screw Size: 2.6mm x 95.2mm (3.75"), .5mm pitch (coarse) / Length of threads: 21mm (.83") / This screw is has 20mm of thread at the end / NNA 12/23/01 / hdc 6/2/92 / UP 7-24-93/eke / updt tjt 050505