TM 1-1500-204-23-6
Table 2-1. Bolt and Screw Markings - CONT
Classification or
Marking
Material
Physical characteristics
specification
Aluminum alloy 7075
TS: 68,000 psi min
MIL-S-1222 (7075)
in T73 temper
1/4 inch dia
and over
Bronze, commercial
TS: 85,000 psi min
NAS380
Nickel aluminum,
TS: 90,000 psi min
MIL-S-1222,
bronze
1/4 inch dia and
grade 632
over
Titanium alloy
TS: 125,000 psi min
MIL-S-1222
T-6AL-4V
1/4 to 1-1/2 inch
grade T7
annealed condition
dia inclusive
TS: 120,000 psi min
over 1-1/2 to 2
inch dia inclusive
TS: 115,000 psi min
over 2 inch dia
Titanium alloy
TS: 145,000 psi min
Ti-AL-4V
1/4 to 1 inch dia
solution treated
inclusive
and aged
TS: 135,000 psi min
over 1 inch dia
1
Marking for corrosion-resistant steel screws. Only one visible dash necessary after slotting operations.
Position optional. No marking required on heads of sizes number 4 or smaller.
2-15
