What is the SKF KM 38 lock nut used for?

It is used to locate and reliably secure bearings axially onto a shaft or sleeve.

What thread size does this lock nut feature?

This lock nut features an M190x3 metric thread.

Which locking device is required for the KM 38?

It requires an MB 38 lock washer to prevent unintentional loosening.

What are the outer dimensions of the SKF KM 38?

The nut has an outside diameter of 240 mm and a width of 28 mm.

Can the SKF KM 38 lock nut be reused?

Yes, as long as it is undamaged, you can reuse the lock nut with a new lock washer.

SKF KM 38 locknut 190 x 240 x 28 mm M190x3

Supplier number: SKF KM 38 | EAN 7316577011343

Recommended Retail Price €483.47

239.20 tax incl.

€197.69 excl. VAT (incl. all environmental contributions)

On stock - immediately available | we have 3 products in stock.

Ordered before 20:00 - delivered as of 10/10/2026
Free shipping
Delivery by DHL
Delivered from Belgium

↓ Documents (1) ✆ Talk to a specialist

Dependable shaft mounting with the Skf KM 38

Practical benefits

Secure axial bearing retention: You keep bearings and drive components firmly locked in position along the shaft, preventing loosening during heavy mechanical operations.
Quick and controlled tightening: Evenly spaced slots around the circumference allow you to engage a compatible hook spanner for effortless installation.
Reusable and durable build: Made from resilient steel, you can reuse this fastening element after servicing simply by fitting an undamaged lock washer.

In a nutshell

The right choise for

With the Skf km 38 lock nut, you securely locate bearings and drive components along cylindrical shafts and adapter sleeves with absolute confidence. Featuring an accurate M190X3 metric thread and a solid steel design, it reliably prevents components from loosening axially under heavy industrial operating conditions. The evenly spaced slots around the outer circumference allow you to tighten the nut quickly and accurately with a compatible hook spanner. When paired with an mb 38 lock washer, you achieve a dependable mechanical locking mechanism essential for powertrain overhauls and gearbox servicing. Its durable construction ensures it can be reused during routine maintenance for efficient servicing.

Product information FAQ

€239.20

In stock - tax incl.

Key features according to our expert

Outer diameter: 240 mm
Width: 28 mm
Thread designation: M190 x 3

Product description

KM and KML lock nuts are used to locate bearings onto a shaft. They have metric threads and four equally spaced slots located around their circumference to accommodate a spanner. They should be locked by a lock washer to prevent unintentional loosening. KM and KML lock nuts can be reused, provided they are not damaged.

Simple, stable and reliable fastening element
Easy to install and remove
Reusable with a new lock washer
Available for thread M 10x0.75 to M 200x3 (sizes 0 to 40)

Documents

⤓ Technical data sheet PDF

All Features

Outer diameter: 240 mm
Width: 28 mm
Thread designation: M190 x 3
Outer diameter: 240
Bore diameter: 190
Associated mounting tool: TMFN 30-40
Nut for hydraulic mounting: No
Locking device: Lock washer

Brand SKF
01230623
EAN 7316577011343
Supplier number SKF KM 38

Frequently asked questions about this product

Answered by specialists

What is the SKF KM 38 lock nut used for?: It is used to locate and reliably secure bearings axially onto a shaft or sleeve.
What thread size does this lock nut feature?: This lock nut features an M190x3 metric thread.
Which locking device is required for the KM 38?: It requires an MB 38 lock washer to prevent unintentional loosening.
What are the outer dimensions of the SKF KM 38?: The nut has an outside diameter of 240 mm and a width of 28 mm.
Can the SKF KM 38 lock nut be reused?: Yes, as long as it is undamaged, you can reuse the lock nut with a new lock washer.