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Technical Data Sheet
PartsTable / COMPONENT / M45913/3-6FG8C
M45913/3-6FG8C ✓ 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 M45913/3-6FG8C is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-814-0672, 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
M45913/3-6FG8C
NSN: 5310-00-814-0672
FSC: 5310
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM45913/3-6FG8C
NSN5310-00-814-0672
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: M45913/3-6FG8C · 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
•
NUT STYLE: HEXAGON
•
THREAD SERIES: UNF
•
THREAD QUANTITY PER INCH: 24
•
BEARING SURFACE TYPE: CHAMFERED
•
TEMP RATING: 250.0 FAHRENHEIT NOMINAL DEGF
•
WIDTH ACROSS FLATS: 0.551 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLEHEXAGON
THREAD SERIESUNF
THREAD QUANTITY PER INCH24
BEARING SURFACE TYPECHAMFERED
TEMP RATING250.0 FAHRENHEIT NOMINAL DEGF
WIDTH ACROSS FLATS0.551 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONMRAP - COUGAR CAT1 A2
NOMINAL THREAD SIZE0.375 INCHES IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT
THREAD CLASS3B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
MIL-DTL-45913/3Interchangeable
interchangeable cross-reference
interchangeable
M45913/3-16FG8CInterchangeable
interchangeable cross-reference
interchangeable
MS51943-50Interchangeable
interchangeable cross-reference
interchangeable
MS51943-12Interchangeable
interchangeable cross-reference
interchangeable
M45913/3-9FG8PInterchangeable
interchangeable cross-reference
interchangeable
23113Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M45913/3-6FG8C?
M45913/3-6FG8C is a M45913/3-6FG8C.
What parts can replace M45913/3-6FG8C?
There are 24 known substitutes for M45913/3-6FG8C: MIL-DTL-45913/3, M45913/3-16FG8C, MS51943-50 and 21 more. Substitute compatibility should be verified for your specific system.
Is M45913/3-6FG8C still available?
M45913/3-6FG8C is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026