FAG KM17 M85x2 Lock Nut

Description

The FAG KM17 is a precision-engineered lock nut, also known as a shaft nut or bearing nut, designed for securing bearings and other components onto a shaft. Manufactured to DIN 981 standards, this nut provides reliable axial location and is an essential component for many rotating machinery applications. It must be used in conjunction with a suitable locking device, typically an MB17 tab washer.

Specifications

• Manufacturer: FAG
• Part Number: KM17
• Thread: M85x2
• Outside Diameter (d2): 110 mm
• Width (b): 16 mm
• Nut Slot Width (n): 10 mm
• Nut Slot Depth (h): 4 mm
• Material: Steel

Label Info

• Brand: FAG
• Model: KM17
• Part Nr: 01111000
• EAN: 4012801052580

Application

This lock nut is widely used in mechanical engineering, automotive industries, and general machine construction to mount bearings with a tapered bore on tapered shaft seats or adapter sleeves. It is also used to dismount bearings from withdrawal sleeves.

Country of Origin

Germany

CO2 Impact

By choosing this pre-owned but unused component, you are contributing to a circular economy and avoiding approximately 0.9 kg of CO2 emissions associated with the production of a new one.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

Question?
What is the correct tightening procedure for a KM17 lock nut?

Answer

The FAG KM17 should be tightened using a C-spanner or hook spanner that fits the four slots on its periphery. It's tightened to a specific torque or angle to achieve the correct bearing preload. After tightening, it must be secured with a corresponding MB17 tab washer by bending one of the washer's tabs into a slot on the nut.

Question?
What is the material and surface treatment of the FAG KM17?

Answer

This lock nut is typically manufactured from high-strength steel. It often has a black oxide or phosphated finish to provide corrosion resistance during transport and storage. Always check the datasheet for specific material grade information if your application has critical requirements.

Question?
Can I reuse a KM17 lock nut and its MB17 washer?

Answer

While the KM17 lock nut itself can often be reused if the threads are undamaged and it has not been over-torqued, it is strongly recommended to always use a new MB17 tab washer. The tab washer is a single-use locking device; bending and re-bending the tab will cause metal fatigue and compromise its locking ability.

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Last Update: Friday, March 13, 2026