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PartsTable / COMPONENT / M45913/3-20FG8C
M45913/3-20FG8C ✓ 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 M45913/3-20FG8C 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 5310-01-522-0301, 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
M45913/3-20FG8C
NSN: 5310-01-522-0301
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM45913/3-20FG8C
NSN5310-01-522-0301
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: M45913/3-20FG8C · 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 SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
MATERIAL: STEEL OVERALL
•
THREAD QUANTITY PER INCH: 12
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
THREAD CLASS: 3B
•
BEARING SURFACE TYPE: CHAMFERED
•
NUT HEIGHT: 1.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
MATERIALSTEEL OVERALL
THREAD QUANTITY PER INCH12
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
THREAD CLASS3B
BEARING SURFACE TYPECHAMFERED
NUT HEIGHT1.125 INCHES NOMINAL IN
NOMINAL THREAD SIZE1.250 INCHES IN
END ITEM IDENTIFICATION2330014491775, TRAILER FLAT BED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
MIL-DTL-45913/3Interchangeable
interchangeable cross-reference
interchangeable
M45913/3-16FG8CInterchangeable
interchangeable cross-reference
interchangeable
MS51943-50Interchangeable
interchangeable cross-reference
interchangeable
TIP00017Interchangeable
interchangeable cross-reference
interchangeable
L31163Interchangeable
interchangeable cross-reference
interchangeable
456720131110Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M45913/3-20FG8C?
M45913/3-20FG8C is a M45913/3-20FG8C.
What parts can replace M45913/3-20FG8C?
There are 23 known substitutes for M45913/3-20FG8C: MIL-DTL-45913/3, M45913/3-16FG8C, MS51943-50 and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M45913/3-20FG8C?
M45913/3-20FG8C is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-522-0301. 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