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.
2 EXHAUST STUDS NUTS SET 1.5 X 42MM LONG
Stainless Steel Exhaust Studs & Nuts For Suzuki SV 650 S No ABS 1999-2014
Stainless Steel Exhaust Studs & Nuts For Honda CB 125 S 1973-1975
Stainless Steel Exhaust Studs & Nuts For Ducati Multistrada 1200 S 2010-2014
2 x NORTON COMMANDO TWIN CYLINDER EXHAUST ROSE NUTS - UK SUPPLIED **MULTIBUY**
Threaded exhaust manifold for DKW RT 175, 175 S/VS, 200/2, 200 S/VS, 350 S
