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Designation system

The designations of SKF bearing accessories follow a system that consists of a product type, size identification and, where applicable, suffixes.

Examples and the applicable options for lock nuts with a lock washer, locking clip or locking plate are listed in the following:


Examples

Lock nut
KML 28
whereKML =
28 =

Lock washer
MB 15 AwhereMB =
15 =
A =

Locking clip
MS 31/710
whereMS 31 =
710 =

Locking plate
PL 68wherePL =
68 =

Applicable options for lock nuts with a lock washer, locking clip or locking plate


Product type
AN
Lock nut, dimensions in accordance with ANSI standard
HM
Lock nut with a trapezoidal thread
HME
HM lock nut with a recessed outside diameter
HML
HM lock nut, light series
HMLL
HML lock nut with a lower sectional height
N
Lock nut, dimensions in accordance with ANSI standard
N 0
Lock nut, dimensions in accordance with ANSI standard, light section
MB
Lock washer, dimensions in accordance with ISO standard for a KM lock nut
MBL
Lock washer, dimensions in accordance with ISO standard for a KML lock nut
MS 30
Locking clip, dimensions in accordance with ISO standard for an HM 30 lock nut
MS 31
Locking clip, dimensions in accordance with ISO standard for an HM 31 lock nut
PL
Locking plate, dimensions in accordance with ANSI/ABMA standard
W
Lock washer, dimensions in accordance with ANSI/ABMA standard


Size identification

Listed in the relevant product tables in Lock nuts with a lock washer, locking clip or locking plate.


Suffixes
BWhitworth thread
TTrapezoidal thread
AIncreased plate thickness for MB lock washers
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