The nuts feature a self-locking design, so when they are fastened to a stud by hand, they will stop when they reach the "locking" portion. You will then need a wrench or socket to fasten it further, at which point it will "lock" in place.
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Yamaha XJR1300 1994-2006 4-2 Stainless 4-2 Exhaust Headers Downpipes & Collector
YAMAHA XV535 1987-2003 FULL 2-2 EXHAUST 410mm SILENCER BULLNOSE BAFFLE
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KAWASAKI VN900 06-16 FULL 2-2 EXHAUST SYSTEM 410mm CUSTOM SILENCER BULL NOSE
