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509-0549 — WASHER,SEAL

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

509-0549: WASHER,SEAL.

The WASHER,SEAL is a the manufacturer industrial component. Key specifications include end_item_identification: GENERATOR SET,DIESEL ENGINE, part_name_assigned_by_controlling_agency: WASHER,SEAL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-620-4404, 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
509-0549
NSN: 5310-01-620-4404
FSC: 5310 — Nuts and Washers
CAGE: 3Z577 — ONAN CORP ONAN POWER/ELECTRONICS DIV (USA)
SPECIFICATIONS
end_item_identificationGENERATOR SET,DIESEL ENGINE
part_name_assigned_by_controlling_agencyWASHER,SEAL
NSN5310-01-620-4404
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 509-0549 · 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
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER,SEAL
END ITEM IDENTIFICATIONGENERATOR SET,DIESEL ENGINE
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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 509-0549?
509-0549 is a WASHER,SEAL.
What is the NSN for 509-0549?
509-0549 is cataloged in the U.S. Government catalog under NSN 5310-01-620-4404. 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.