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ST3M744-5D18 — BOLT,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ST3M744-5D18: BOLT,CLOSE TOLERANCE.

The BOLT,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL COMP XM-13 OVERALL, head_style: SPLINE DRIVE SHEAR HEAD, grip_length: 1.125 INCHES NOMINAL IN, head_height: 0.187 INCHES NOMINAL IN, thread_class: 3A A, grip_diameter: 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-624-8447, 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
ST3M744-5D18
NSN: 5306-01-624-8447
FSC: 5306 — Bolts
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL COMP XM-13 OVERALL
head_styleSPLINE DRIVE SHEAR HEAD
grip_length1.125 INCHES NOMINAL IN
head_height0.187 INCHES NOMINAL IN
thread_class3A A
grip_diameter0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN
thread_length0.375 INCHES NOMINAL IN
fastener_length1.5 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
head_minor_diameter0.514 INCHES MINIMUM AND 0.521 INCHES MAXIMUM IN
end_item_identificationF-15SA
NSN5306-01-624-8447
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST3M744-5D18 · 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
•
HEAD HEIGHT: 0.187 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.5 INCHES NOMINAL IN
•
THREAD LENGTH: 0.375 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.3125 INCHES IN
•
HEAD STYLE: SPLINE DRIVE SHEAR HEAD
•
THREAD DIRECTION: RIGHT-HAND
•
GRIP LENGTH: 1.125 INCHES NOMINAL IN
•
HEAD MINOR DIAMETER: 0.514 INCHES MINIMUM AND 0.521 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.187 INCHES NOMINAL IN
FASTENER LENGTH1.5 INCHES NOMINAL IN
THREAD LENGTH0.375 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.3125 INCHES IN
HEAD STYLESPLINE DRIVE SHEAR HEAD
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH1.125 INCHES NOMINAL IN
HEAD MINOR DIAMETER0.514 INCHES MINIMUM AND 0.521 INCHES MAXIMUM IN
GRIP DIAMETER0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
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
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST3M744-5D18?
ST3M744-5D18 is a BOLT,CLOSE TOLERANCE.
What is the NSN for ST3M744-5D18?
ST3M744-5D18 is cataloged in the U.S. Government catalog under NSN 5306-01-624-8447. 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.