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PartsTable / COMPONENT / 363879-3
363879-3 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,FLAT is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-222-4117, 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
363879-3
NSN: 5310-01-222-4117
FSC: 5310
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
Part Number363879-3
NSN5310-01-222-4117
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 363879-3 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
N401P8CInterchangeable
interchangeable cross-reference
interchangeable
AMS-QQ-P-416Interchangeable
interchangeable cross-reference
interchangeable
ASTM B121/B121M UNS-C33500 ANNEAInterchangeable
interchangeable cross-reference
interchangeable
LSN62CKInterchangeable
interchangeable cross-reference
interchangeable
8437849Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 363879-3?
363879-3 is a WASHER,FLAT.
What parts can replace 363879-3?
There are 9 known substitutes for 363879-3: N401P8C, AMS-QQ-P-416, ASTM B121/B121M UNS-C33500 ANNEA and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 363879-3?
363879-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-222-4117. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026