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Technical Data Sheet
PartsTable / COMPONENT / M45913/3-4FG8P
M45913/3-4FG8P ✓ 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 M45913/3-4FG8P 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 5310-01-374-0508, 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
M45913/3-4FG8P
NSN: 5310-01-374-0508
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM45913/3-4FG8P
NSN5310-01-374-0508
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: M45913/3-4FG8P · 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
KEY FEATURES
•
THREAD CLASS: 3B
•
THREAD DIRECTION: RIGHT-HAND
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT: PHOSPHATE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-N-45913 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NUT HEIGHT: 0.212 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B
THREAD DIRECTIONRIGHT-HAND
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NOMINAL THREAD SIZE0.250 INCHES IN
MATERIALSTEEL OVERALL
SURFACE TREATMENTPHOSPHATE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-N-45913 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NUT HEIGHT0.212 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
THREAD SERIESUNF
THREAD QUANTITY PER INCH28
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
MS51943-4Interchangeable
interchangeable cross-reference
interchangeable
5310PL0918864Interchangeable
interchangeable cross-reference
interchangeable
M45913/3-5FG8PInterchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-45913Interchangeable
interchangeable cross-reference
interchangeable
MS51943-57Interchangeable
interchangeable cross-reference
interchangeable
M45913/3-24FG8CInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M45913/3-4FG8P?
M45913/3-4FG8P is a M45913/3-4FG8P.
What parts can replace M45913/3-4FG8P?
There are 21 known substitutes for M45913/3-4FG8P: MS51943-4, 5310PL0918864, M45913/3-5FG8P and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M45913/3-4FG8P?
M45913/3-4FG8P is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-374-0508. 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