Dover HEIL DuraPack Python - Bolt Type Identification Chart

Issued July 2024
General Information
Copyright 2024, The Heil Co.
Printed in the U.S.A.
General Information
23
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