Product type
JFK locknuts
Axial securing on threaded shafts, from standard to high-precision applications
Standard, precision, and self-locking locknuts: the complete range for every operating condition.
JFK locknuts are threaded devices designed for the axial securing of bearings and mechanical components on threaded shafts. The range is divided into three main families: KM locknuts with metric threads and locking washers, KMT and KMTA precision locknuts with three brass locking set screws, and GUK and GUP self-locking locknuts with an integrated self-locking system. Each family offers specific characteristics in terms of precision, ease of installation, and locking capability.
Not sure which type is the right choice for you? The "Selection guide" section at the bottom of this page will help you identify the best solution for your application. Alternatively, contact us directly for technical assistance.
JFK locknuts are threaded devices designed for the axial securing of bearings and mechanical components on threaded shafts. The range is divided into three main families: KM locknuts with metric threads and locking washers, KMT and KMTA precision locknuts with three brass locking set screws, and GUK and GUP self-locking locknuts with an integrated self-locking system. Each family offers specific characteristics in terms of precision, ease of installation, and locking capability.
Not sure which type is the right choice for you? The "Selection guide" section at the bottom of this page will help you identify the best solution for your application. Alternatively, contact us directly for technical assistance.
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Three types for every shaft securing requirement
KM locknuts for standard applications; KMT and KMTA precision locknuts for high-precision applications; GUK and GUP self-locking locknuts for environments with vibration and dynamic loads.
KMT and KMTA Precision Locknuts
Three brass locking set screws · High precision · No locking washer required Three brass locking set screws. High positioning accuracy and adjustability, with no locking washer required. KMT features slots, while KMTA has a smooth outer surface for applications with limited space.
GUK and GUP self-locking locknuts
Integrated self-locking system · Standard and heavy-duty series Integrated self-locking system. High stability under vibration and dynamic loads. GUK standard series, GUP heavy-duty series for more demanding applications.TECHNICAL COMPARISON
Which locknut for which application
Concise comparison of the main parameters: locking system, precision, and whether a locking washer is required. For specific sizing requirements, the JFK technical team is available to provide direct support.
| Type | Locking | Locking washers | Features and use |
|---|---|---|---|
| KM | With locking washers | Required | Standard solution for transmissions and industrial systems. |
| KMT / KMTA | Three brass set screws | Not required | High positioning precision; reduced axial space with KMTA. |
| GUK / GUP | Integrated self-locking mechanism | Not required | Stability under vibration and dynamic loads. |
SELECTION GUIDE
Start by identifying the operating conditions
The choice depends on the required level of precision, the available axial space, and the presence of vibration or dynamic loads. Start with the operating condition that best describes your application.
Standard bearing securing on shafts
KM locknuts for most standard industrial applications, used in combination with locking washers. High positioning accuracy required
KMT locknuts for high-precision positioning without locking washers, thanks to the three brass locking set screws.
Limited axial space
KMTA locknuts feature a smooth outer surface for applications with limited axial space and can also be used as components in non-contact protective guards. Vibrations and dynamic loads
GUK and GUP self-locking locknuts for operating conditions involving significant vibration or dynamic loads that could loosen conventional solutions.Contacts
Request information JFK locknuts
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Haven’t found the right solution?
JFK’s technical team analyses loads, speeds and operating conditions to identify the right solution.