Designation system

The designations of SKF bearing accessories follow a system that consists of a product type and size identification with or without a suffix.

An example and the applicable options for precision lock nuts with locking pins are given below.
Basic bearing designation system
KMT 8
whereKMT =
8 =

Applicable options for precision lock nuts with locking pins

Test Designation 2
Product type
KMT
Precision lock nut with locking pins
KMTA
Precision lock nut with locking pins and with cylindrical outside surface (some with different thread pitch to KMT nuts)

Test Designation 2
Size identification

0

10 mm thread diameter
1
12 mm thread diameter
2
15 mm thread diameter
3
17 mm thread diameter
4 to
(x5) 20 mm thread diameter
84
(x5) 420 mm thread diameter

Catalogue image - Test Designation 3
Suffixes (n.a.)
SKF logo