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MS9491-18 — BOLT,AIRCRAFT,MATER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MS9491-18: BOLT,AIRCRAFT,MATER.

The BOLT,AIRCRAFT,MATER is a the manufacturer industrial component. Key specifications include end_item_identification: USED ON THE KC130J ENGINE, criticality_code_justification: AGAV. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-009-6632, 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
MS9491-18
NSN: 5306-01-009-6632
NIINs: 010096632, 014974200
FSC: 5306 — Bolts
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
end_item_identificationUSED ON THE KC130J ENGINE
criticality_code_justificationAGAV
NSN5306-01-009-6632
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS9491-18 · 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 FINISH: 32.0 MICROINCHES THREADS
•
HEAD HEIGHT: 0.188 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.865 INCHES MINIMUM AND 0.925 INCHES MAXIMUM IN
•
HARDNESS RATING: 24.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES THREADS
SURFACE FINISH32.0 MICROINCHES GRIP
SURFACE FINISH32.0 MICROINCHES BEARING SURFACE OF HEAD
HEAD HEIGHT0.188 INCHES NOMINAL IN
FASTENER LENGTH1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN
THREAD LENGTH0.865 INCHES MINIMUM AND 0.925 INCHES MAXIMUM IN
HARDNESS RATING24.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.312 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
SUBSTITUTES & CROSS-REFERENCES 1
5306PL1496496Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 MS9491-18?
MS9491-18 is a BOLT,AIRCRAFT,MATER.
What parts can replace MS9491-18?
There is 1 known substitute for MS9491-18: 5306PL1496496. Substitute compatibility should be verified for your specific system.
What is the NSN for MS9491-18?
MS9491-18 is cataloged in the U.S. Government catalog under NSN 5306-01-009-6632. 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.