Technical data
17 parametersIdentification
- Manufacturer
- FAG
- Type
- Locknut
- Part number (SKU)
- KM21#N1
- EAN
- 4012801222945
Dimensions
- Width B
- 18 mm
- Mass
- 879 g
Full manufacturer specification11 parameters · expand
- Axial load capacity, static
- 320000.0 N
- Chamfer angle
- 30.0 °
- Chamfer diameter
- 126.0 mm
- Fuse
- MB21
- Height retaining slot
- 5.0 mm
- Outerside diameter
- 140.0 mm
- PFAS
- no
- REACH
- REACH compliant
- RoHS
- RoHS compliant
- Thread
- M105x2
- Width retaining slot
- 12.0 mm
Classification
- Manufacturer category
- Rolling and Plain Bearings › Accessories › Locknuts
- eCl@ss class
- 23-11-07-02
- UNSPSC
- 31161727
Description
Locknut KM21 secures bearings on a shaft by locking against a threaded seat, transmitting axial clamping force through its ring geometry once tightened with a matching lock washer. Main dimensions follow DIN 981, with a width of 18.0 mm and a net mass of 0.879 kg. The KM21 is intended for fixing bearing inner rings on a threaded shaft section, providing a defined axial position and preventing loosening under running loads. Correct installation requires tightening against the shaft shoulder or adjacent component and locking the tabs into the corresponding washer slots to maintain the set position during operation.
The same bearing from other manufacturers (5 designations)
Same size and design — suffix notation differs between brands.
FAG
KM21
original — this page
equivalent designation
DAG
630458
NSK
KM21
SKF
KM21
SNR
KM21
STEYR
KM21
This is a dimensional and design equivalent, not the same product. If in doubt, ask us before ordering.
For mounting this bearing
The sleeve, nut and lock washer needed to mount the bearing, followed by matching housings. All from our catalogue.
KM21
Locknut
od EUR 25.05net
+ VAT 23% = EUR 30.81 gross
Cheaper in larger quantities
| from 5 pcs | EUR 24.55 | −2% |
| from 10 pcs | EUR 24.30 | −3% |
| from 25 pcs | EUR 23.80 | −5% |
| from 50 pcs | EUR 23.30 | −7% |
Dispatched within 24 h from our own warehouse
Shipping within the EU: DHL, GLS, from EUR 13.16 net. Transit time 3–5 business days after dispatch. Shipping and returns →
Buying for a company?
Open a business account →Documentation
Datasheet (PDF)RoHS / REACH compliance declaration (PDF)Opening a document for the first time can take up to a minute while the manufacturer prepares it.