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ST3M731-3-26 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ST3M731-3-26: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: TITANIUM OVERALL, head_style: HEXAGON, thread_class: 3A A, thread_length: 0.190 INCHES MINIMUM IN, surface_treatment: ALUMINUM OVERALL, thread_series_designator: UNIFIED NATIONAL JOINT FINE (UNJF). This part is cataloged in the U.S.

Government catalog under NSN 5306-01-408-1374, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
ST3M731-3-26
NSN: 5306-01-408-1374
FSC: 5306 — Bolts
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialTITANIUM OVERALL
head_styleHEXAGON
thread_class3A A
thread_length0.190 INCHES MINIMUM IN
surface_treatmentALUMINUM OVERALL
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF)
surface_treatment_document_and_classificationMIL-C-83488 MIL SPEC ALL TREATMENT RESPONSES OVERALL
NSN5306-01-408-1374
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST3M731-3-26 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-83488 MIL SPEC ALL TREATMENT RESPONSES OVERALL
•
THREAD LENGTH: 0.190 INCHES MINIMUM IN
•
HEAD STYLE: HEXAGON
•
SURFACE TREATMENT: ALUMINUM OVERALL
•
THREAD CLASS: 3A A
•
MATERIAL: TITANIUM OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF)
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-83488 MIL SPEC ALL TREATMENT RESPONSES OVERALL
THREAD LENGTH0.190 INCHES MINIMUM IN
HEAD STYLEHEXAGON
SURFACE TREATMENTALUMINUM OVERALL
THREAD CLASS3A A
MATERIALTITANIUM OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF)
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST3M731-3-26?
ST3M731-3-26 is a BOLT,MACHINE.
What is the NSN for ST3M731-3-26?
ST3M731-3-26 is cataloged in the U.S. Government catalog under NSN 5306-01-408-1374. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.