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AIC518-4-4 — BOLT,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

AIC518-4-4: BOLT,CLOSE TOLERANCE.

The BOLT,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: TITANIUM ALLOY UNS R56400 OVERALL, head_style: DISHED HEXAGON, grip_length: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, head_height: 0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.2495 INCHES MINIMUM AND 0.2940 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-354-7717, 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
AIC518-4-4
NSN: 5306-01-354-7717
FSC: 5306 — Bolts
CAGE: 06725 — SPS TECHNOLOGIES, LLC DBA AIR INDUSTRIES COMPANY DIV AIR INDUSTRIES COMPANY (USA)
SPECIFICATIONS
materialTITANIUM ALLOY UNS R56400 OVERALL
head_styleDISHED HEXAGON
grip_length0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
head_height0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.2495 INCHES MINIMUM AND 0.2940 INCHES MAXIMUM IN
thread_length0.425 INCHES NOMINAL IN
fastener_length0.670 INCHES MINIMUM AND 0.680 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
features_providedDRY FILM LUBRICANT
surface_treatmentDISULFIDE MOLYBDENUM OVERALL
width_between_flats0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
NSN5306-01-354-7717
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AIC518-4-4 · 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: 0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.670 INCHES MINIMUM AND 0.680 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-L-8937 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.425 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
FEATURES PROVIDED: DRY FILM LUBRICANT
•
HEAD STYLE: DISHED HEXAGON
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
FASTENER LENGTH0.670 INCHES MINIMUM AND 0.680 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-L-8937 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.425 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES IN
FEATURES PROVIDEDDRY FILM LUBRICANT
HEAD STYLEDISHED HEXAGON
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
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 4
VEH160271-4M4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
110185-4-M4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
GB511BY4M4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
BM15016-4-4ASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AIC518-4-4?
AIC518-4-4 is a BOLT,CLOSE TOLERANCE.
What parts can replace AIC518-4-4?
There are 4 known substitutes for AIC518-4-4: VEH160271-4M4, 110185-4-M4, GB511BY4M4 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AIC518-4-4?
AIC518-4-4 is cataloged in the U.S. Government catalog under NSN 5306-01-354-7717. 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.