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A0684 — NUT,SELF-LOCKING,DOUBLE HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

A0684: NUT,SELF-LOCKING,DOUBLE HEXAGON.

NUT,SELF-LOCKING,DOUBLE HEXAGON. Key specifications include special_features: LEFT ANTI ICING MANIFOLD, ANTI ICING AIR SUPPLY TUBE AND CLAMPS, end_item_identification: ADVANCED PILOT TRAINING AIRCRAFT, T50, USAF MODELS F100 PW 22- AND F100 PW 220E, part_name_assigned_by_controlling_agency: NUT SELF LOCK, DOUBLE HEX. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-573-0542, 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
A0684
NSN: 5310-01-573-0542
FSC: 5310 — Nuts and Washers
CAGE: 15284 — EATON CORPORATION DIV FED (USA)
SPECIFICATIONS
special_featuresLEFT ANTI ICING MANIFOLD, ANTI ICING AIR SUPPLY TUBE AND CLAMPS
end_item_identificationADVANCED PILOT TRAINING AIRCRAFT, T50, USAF MODELS F100 PW 22- AND F100 PW 220E
part_name_assigned_by_controlling_agencyNUT SELF LOCK, DOUBLE HEX
NSN5310-01-573-0542
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A0684 · 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
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESLEFT ANTI ICING MANIFOLD, ANTI ICING AIR SUPPLY TUBE AND CLAMPS
PART NAME ASSIGNED BY CONTROLLING AGENCYNUT SELF LOCK, DOUBLE HEX
END ITEM IDENTIFICATIONADVANCED PILOT TRAINING AIRCRAFT, T50, USAF MODELS F100 PW 22- AND F100 PW 220E
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Demilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is A0684?
A0684 is a NUT,SELF-LOCKING,DOUBLE HEXAGON.
What is the NSN for A0684?
A0684 is cataloged in the U.S. Government catalog under NSN 5310-01-573-0542. 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.