SKF KM 4 locknut 20 x 32 x 6 mm M20x1

Supplier number: SKF KM 4 | EAN 7316577758873

9.86 tax incl.

€8.15 excl. VAT (incl. all environmental contributions)

On stock - immediately available

Ordered before 20:00 - delivered tomorrow 29/09/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Delivered from Belgium

↓ Documents (1) ✆ Talk to a specialist

Reliable bearing location with Skf

Practical benefits

Accurate and stable positioning: The M20X1 thread lets you locate and secure bearings firmly on the shaft without unwanted axial movement.
Positive locking with washer: Four evenly spaced slots enable you to lock the nut securely against vibration using an MB lock washer.
Durable and reusable steel: Built to DIN 981 standards, you can easily install, remove, and reuse this component during maintenance.

In a nutshell

The right choise for

With the Skf km 4 lock nut, you reliably locate and secure bearings and drive components on shafts and adapter sleeves. Featuring a precision M20X1 thread, an outside diameter of 32 mm, and a width of 6 mm, it prevents unwanted axial movement and loosening caused by vibrations. Four evenly spaced slots around the circumference allow positive locking in combination with an mb 4 lock washer. Manufactured from durable steel in accordance with din 981, this lock nut allows easy mounting, removal, and reuse during routine maintenance whenever undamaged.

Product information FAQ

€9.86

In stock - tax incl.

Key features according to our expert

Outer diameter: 32 mm
Width: 6 mm
Thread designation: M20 x 1

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: 32 mm
Width: 6 mm
Thread designation: M20 x 1
Outside diameter: 32
Bore diameter: 20
Associated mounting tool: HN 4
Nut for hydraulic mounting: No
Locking device: Lock washer

Brand SKF
01230591
EAN 7316577758873
Supplier number SKF KM 4

Frequently asked questions about this product

Answered by specialists

What thread size does this lock nut have?: The SKF KM 4 lock nut has an M20x1 metric thread.
What are the dimensions of this KM 4 lock nut?: The lock nut has an outside diameter of 32 mm and a width of 6 mm.
Which lock washer is compatible with this nut?: This nut is secured on the shaft using an MB 4 or MB(L) 4 lock washer.
Can this lock nut be reused?: Yes, provided it is not damaged, you can reuse the nut with a new lock washer.
What is the purpose of a KM lock nut?: It is used to reliably locate and secure bearings or components axially onto a shaft.