ISO 9001:2015 - AS9100D Registered

KATO Revolutionary LockOne Product

LockOne is a revolutionary positive locking fastener designed to prevent a standard nut from loosening free under vibration. Upon installation, LockOne coils stretch, providing a superior locking force. Unlike nuts with nylon or locking compounds, LockOne does not degrade with each use. Due to the unique LockOne design, the assembly is FOD free. Save on assembly cost! No expensive replacement nuts! LockOne’s lightweight design is perfect for use on weight sensitive applications. KATO LockOne replaces nylon nuts, double nuts (jam nuts), cotter pins, safety-wire, and thread locking compounds.

See the new Lockone product in action!



LockOne fasteners underwent 30,000 cycle accelerated vibration testing in accordance with NAS3350 (National Aerospace Specification for impact type vibration test). In fact, even after 180,000 cycles the LockOne assembly remained intact!

LockOne can be easily substituted into existing designs. LockOne is reusable1, does not degrade with each cycle. Made from 304 Stainless Steel WPB, LockOne is naturally corrosion resistant.

Design and Assembly

Designing in LockOne couldn’t be easier! All that’s required are three bolt threads beyond the nut. That’s it! It’s compact nature allows for ease of use in designs with weight restrictions and maintenance schedules.

LockOne is fast and easy to install. No locking compounds to apply. A standard dodecagonal (12-Point) socket installs the LockOne at the same time as the nut, minimizing installation time. LockOne may also be installed on exisiting applications, simply thread LockOne on the preinstalled nut. LockOne can be easily removed and is completely resuable after installation with the same 12-point socket.

For further assistance contact a Century Fasteners branch or a Regional Sales Manager.