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M45913/3-20FG8C — Technical Data Sheet

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— · 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 NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 1.125 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNIFIED NATIONAL COARSE (UNC), locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System 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
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height1.125 INCHES NOMINAL IN
thread_class3B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
width_across_flats1.801 INCHES MINIMUM AND 1.815 INCHES MAXIMUM IN
nominal_thread_size1.250 INCHES IN
bearing_surface_typeCHAMFERED
end_item_identification2330014491775, TRAILER FLAT BED
thread_quantity_per_inch12
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
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-45913/3InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
M45913/3-16FG8CInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MS51943-50InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
TIP00017InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
L31163InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
456720131110InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M45913/3-20FG8C?
M45913/3-20FG8C is a NUT,SELF-LOCKING,HEXAGON.
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 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: October 2026