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MCF13373 ✓ 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,LOCK 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 5310-01-064-7700, 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
MCF13373
NSN: 5310-01-064-7700
FSC: 5310
CAGE: 76050 — EATON AEROSPACE LLC DBA STERER ENGINEERING DIV M.C.AEROSPACE (USA)
SPECIFICATIONS
Part NumberMCF13373
NSN5310-01-064-7700
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MCF13373 · 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 17
G374921PC57Interchangeable
interchangeable cross-reference
interchangeable
D8425PC33Interchangeable
interchangeable cross-reference
interchangeable
D7974PC36Interchangeable
interchangeable cross-reference
interchangeable
10-22038Interchangeable
interchangeable cross-reference
interchangeable
W06Interchangeable
interchangeable cross-reference
interchangeable
75M193Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MCF13373?
MCF13373 is a WASHER,LOCK.
What parts can replace MCF13373?
There are 17 known substitutes for MCF13373: G374921PC57, D8425PC33, D7974PC36 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MCF13373?
MCF13373 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-064-7700. 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