Lock Nuts & Washers
Precision KM-type locknuts and MB-type lockwashers for securing bearings and adapter sleeves onto shafting, stocked across the common metric size range.
Product Range
Products We Stock
Locking hardware in the standard sizes used across our bearing range.
M10 to M100
KMT Locknuts
Locknuts with integrated locking screws, no lockwasher required.
Enquire Now Matched to KM sizes
MB Lockwashers
Tab washers preventing locknut back-off once tightened.
Enquire Now Select larger sizes
Locking Plates
Alternative locking method for larger diameter locknuts.
Enquire NowSpecifications
Typical Specifications
Representative ranges across the stocked locking hardware range.
Standard Reference
DIN 5406 dimensions
- Thread size range
- M10 to M100
- Locknut type
- KM standard, KMT self-locking
- Washer type
- MB tab washer
- Material
- Bearing steel
- Finish
- Black oxide standard
- Temperature range
- -20 C to +150 C
- Compatibility
- Adapter sleeves, direct shaft mounting
- Torque values
- Manufacturer-specified per size
Our Brands
Brands For
This Range
Stocked across our general bearing brand range.
Buying Guide
Choosing Locknuts and Washers
What to confirm before ordering.
Step 01
Match thread size exactly
Locknut thread size must match the shaft or sleeve thread precisely, confirm before ordering.
Step 02
KM or KMT
KMT locknuts include their own locking screws and skip the need for a separate lockwasher, simplifying installation.
Step 03
Always replace the washer with the nut
Reusing a bent lockwasher risks it failing to prevent the nut from loosening.
Standards
Standards and Quality
Dimensional standards for this hardware family.
DIN 5406
Locknuts and Washers
Standard dimensions ensuring interchangeability across brands.
Precision Thread
Ground Thread Form
Precision-cut threads for reliable, repeatable clamping force.
Self-Locking Option
KMT Type
Integrated locking screws eliminate the need for a tab washer.
Traceable
Batch Marked
Size and batch stamped on every unit.
Applications
Common Applications
Typical use cases for this hardware.
01
Adapter Sleeve Retention
Securing sleeve-mounted bearings onto plain shafts.
02
Direct Shaft-End Mounting
Retaining bearings threaded directly onto a shaft end.
03
Spindle Assemblies
Precision locking on machine tool spindles.
04
Pump Shaft Assemblies
Bearing retention on pump drive shafts.
05
Gearbox Output Shafts
Securing output bearings against axial movement.
06
Fan and Blower Shafts
Bearing retention on industrial fan assemblies.
Industries
Industries We Serve
Where sleeve and shaft-mounted bearings need secure locking.
Heavy Industry
Locking hardware for spherical roller bearing mounting.
Material Handling
Conveyor pulley shaft bearing retention.
General Engineering
Any shaft-mounted bearing requiring axial locking.
Machine Building
New equipment builds needing precision locking hardware.
FAQ
Frequently Asked Questions
Common questions about lock nuts & washers, answered by our counter team.
What size locknut do I need?
Locknut size is determined by the shaft or adapter sleeve thread, send us the thread size or the bearing designation and we will confirm the matching locknut.
Can I reuse a lockwasher?
It is not recommended, a bent or fatigued lockwasher may fail to lock the nut securely, always replace it when replacing the locknut.
What is the advantage of a KMT locknut?
KMT locknuts have built-in locking screws that bite directly into the shaft thread, eliminating the separate lockwasher and slightly simplifying installation.
Need locknuts and washers priced?
Send the thread size or bearing designation on WhatsApp for same-day confirmation.
Contact Us