TM 1-1500-204-23-6
Table 2-1. Bolt and Screw Markings - CONT
Classification or
Marking
Material
Physical characteristics
specification
TS: 105,000 psi min
1-1/8 to 1-1/2 inch dia
inclusive
RH: C19-31
Reason Updating per ANSI B18 2 1 Appendix 111
Low Carbon
TS: 120,000 psi min
ASTM-A325,
Martenste Steel,
1/2 to 1 inch dia
Type 2
Quenched and
inclusive
Tempered
RH: C24-35
Reason. Updating per ANSI B18 2 1 Appendix 111
Atmospheric Corrosion TS: 120,000 psi min
ASTM-A325,
(Weathering) Steel,
1/2 to 1 inch dia
Type 3
Quenched and
inclusive
Tempered
RH: C24-35
TS: 105,000 psi min
1-1/8 to 1-1/2 inch dia
inclusive
RH: C19-31
Reason: Updating per ANSI B18.2 1 Appendix 111
Alloy Steel,
TS- 125,000 psi min
AS1M-A354,
Quenched and
1/4 to 2-1/2 inch
Grade BC
Tempered
dia
RH: C2636
TS: 115,000 psi min
over 2-1/2 inch dia
RH C22-33
Reason Updating per ANSI B18 2 1 Appendix 111
Medium Carbon
TS. 150,000 psi min
SAE J429,
Alloy Steel,
1/4 to 2-1/2 inch
Grade 7
Quenched and
dia inclusive
Tempered
RH. C28-34
Roll Threaded
Reason Updating per ANSI B18 2 1 Appendix 111
After Heat
Treatment
Medium Carbon
TS: 150,000 psi min
MIL-S-1222,
Alloy Steel,
1/4 to 2-1/2 inch
Grade 8
Quenched and
dia inclusive
Tempered
RH: C32-38
2-4
