Dover HEIL Half/Pack Factor AFL - Bolt Type Identification Chart

Half/Pack
®
Issued April 2018
General Information
Copyright 2018, Heil Environmental
Printed in the U.S.A.
General Information
15
BOLT TYPE IDENTIFICATION CHART
IH
Type
S.A.E.
Grade
Description
Bolt Head
Marking**
1
1 or 2
No radial lines.
Low or medium carbon steel not heat treated.
NOT USED, replace with same grade bolt.
5
5
Three radial lines.
Quenched and tempered medium carbon steel.
8
8
Six radial lines.
Quenched and tempered special carbon or alloy steel