Strike Industries Jam Nut Black One Size PART-JAM NUT. Thread the Jam Nut onto the barrel followed by the muzzle device. Once you have your muzzle device timed how you want it turn the Jam Nut until its up against your muzzle device and lock it down. Available in 1/2"-28 TPI (.223/5.56) thread pitch for just about any application. Also a replacement part for the Jam Nut that is included in the Strike Industries Miller Comp. Specifications for Strike Industries Jam Nut: Manufacturer: Strike Industries Color: Black Fabric/Material: 1144 Carbon steel Features of Strike Industries Jam Nut Assists in timing of muzzle device Available in 1/2"28 TPI (.223/5.56) thread pitch Replacement Jam Nut for Miller Comp Quench Polish Quench (QPQ) process finish AISI 1144 steel Package Contents: Strike Industries Jam Nut 1x Jam Nut Strike Industries PART-JAM NUT: Jam Nut Black One Size