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Technical Data Sheet
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5EX3 ✓ 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 5310-01-160-3971, 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
5EX3
NSN: 5310-01-160-3971
FSC: 5310
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
Part Number5EX3
NSN5310-01-160-3971
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5EX3 · 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 8
03-2912Interchangeable
interchangeable cross-reference
interchangeable
LM3203304 PIECE 23Interchangeable
interchangeable cross-reference
interchangeable
44NFCPInterchangeable
interchangeable cross-reference
interchangeable
32912Interchangeable
interchangeable cross-reference
interchangeable
8735864Interchangeable
interchangeable cross-reference
interchangeable
8716Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5EX3?
5EX3 is a WASHER,FLAT.
What parts can replace 5EX3?
There are 8 known substitutes for 5EX3: 03-2912, LM3203304 PIECE 23, 44NFCP and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5EX3?
5EX3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-160-3971. 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