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PartsTable / COMPONENT / M45913/1-4FG5C
M45913/1-4FG5C ✓ 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 M45913/1-4FG5C 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 5310-00-959-7600, 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
M45913/1-4FG5C
NSN: 5310-00-959-7600
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM45913/1-4FG5C
NSN5310-00-959-7600
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: M45913/1-4FG5C · 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
•
LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT
•
THREAD QUANTITY PER INCH: 28
•
TEMP RATING: 250.0 FAHRENHEIT NOMINAL DEGF
•
WIDTH ACROSS FLATS: 0.428 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
BEARING SURFACE FINISH: 125.0 MICROINCHES
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
THREAD QUANTITY PER INCH28
TEMP RATING250.0 FAHRENHEIT NOMINAL DEGF
END ITEM IDENTIFICATIONMRAP RG-31 & ROUTE CLEARANCE VEHICLE; MEDIUM MINE PROTECTED VEHICLE - MMPV
WIDTH ACROSS FLATS0.428 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
THREAD SERIESUNF
BEARING SURFACE FINISH125.0 MICROINCHES
NOMINAL THREAD SIZE0.250 INCHES IN
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
MATERIALPLASTIC POLYAMIDE NYLON LOCKING INSERT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
048661Interchangeable
interchangeable cross-reference
interchangeable
10321Interchangeable
interchangeable cross-reference
interchangeable
L1206Interchangeable
interchangeable cross-reference
interchangeable
206MInterchangeable
interchangeable cross-reference
interchangeable
B6935Interchangeable
interchangeable cross-reference
interchangeable
FFS92TYPE1STYLE4SInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M45913/1-4FG5C?
M45913/1-4FG5C is a M45913/1-4FG5C.
What parts can replace M45913/1-4FG5C?
There are 26 known substitutes for M45913/1-4FG5C: 048661, 10321, L1206 and 23 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M45913/1-4FG5C?
M45913/1-4FG5C is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-959-7600. 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