Engine distributors DSG-423 - Bolt Strength Identification; Hex Nut Strength Identification

DSG-423 METRICS
09 -3
BOLT STRENGTH IDENTIFICATION
English System
English (inch) bolts: Identification marks correspond to bolt strength, increasing number of slashes represent
increasing strength.
Metric System
Metric (mm) bolts: Identification class numbers correspond to bolt strength, increasing numbers represent
increasing strength. Common metric fastener bolt strength property are 9.8 and 10.9 with the class identification
embossed on the bolt head.
HEX NUT STRENGTH IDENTIFICATION
English System - Grade Identification Metric System - Class Identification
Increasing dots represent increasing strength. May also have blue finish or paint daub on hex flat.
Increasing numbers represent increasing strength.
HEX NUT
Grade 5
(3 dots)
HEX NUT
Grade 8
(6 dots)
HEX NUT
Property Class 9
(Arabic 9)
HEX NUT
Property Class 10
(Arabic 10)