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390499 — 390499

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

390499: 390499.

The 390499 is a the manufacturer industrial component. Key specifications include overall_width: 0.985 INCHES NOMINAL IN, overall_height: 2.110 INCHES NOMINAL IN, overall_length: 4.985 INCHES NOMINAL IN, transmission_line_type: COAXIAL CABLE, electrical_power_source_relationship: SELF-CONTAINED. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-184-9446, 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
MRO→ MRO_GENERAL→ 390499
NSN: 5310-00-184-9446
NIINs: 001849446, 011572814
FSC: 5310 — Nuts and Washers
CAGE: 62983 — EATON AEROSPACE, LLC DBA JACKSON SOUTH (USA)
SPECIFICATIONS
overall_width0.985 INCHES NOMINAL IN
overall_height2.110 INCHES NOMINAL IN
overall_length4.985 INCHES NOMINAL IN
transmission_line_typeCOAXIAL CABLE
electrical_power_source_relationshipSELF-CONTAINED
NSN5310-00-184-9446
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 390499 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FLANGE WIDTH ACROSS FLATS: 0.625 INCHES NOMINAL IN
•
NUT LENGTH: 0.290 INCHES MINIMUM AND 0.294 INCHES MAXIMUM IN
•
FLANGE THICKNESS: 0.094 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
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THREAD DIRECTION: RIGHT-HAND
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NOMINAL THREAD SIZE: 0.250 INCHES IN
•
NUT DIAMETER: 0.400 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE: HEXAGONAL FLANGE
TECHNICAL CHARACTERISTICS
FLANGE WIDTH ACROSS FLATS0.625 INCHES NOMINAL IN
NUT LENGTH0.290 INCHES MINIMUM AND 0.294 INCHES MAXIMUM IN
FLANGE THICKNESS0.094 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
NUT DIAMETER0.400 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPEHEXAGONAL FLANGE
CROSS-SECTIONAL SHAPEROUND NUT
NUT STYLESLEEVE
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 390499?
390499 is a 390499. It is classified as a MRO (MRO_GENERAL).
What is the NSN for 390499?
390499 is cataloged in the U.S. Government catalog under NSN 5310-00-184-9446. 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.