China

GB307.1

0

6

5

4

2

International

standard Organization

ISO

0

6

5

4

2

Sweden

SKF

P0

P6

P5

P4

P2

Germany

DIN

P0

P6

P5

P4

P2

Japan

JIS

P0

P6

P5

P4

P2

U.S.A

ANSI

ABEC-1

ABEC-3

ABEC-5

ABEC-7

ABEC-9