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PartsTable / COMPONENT / M45913/3-4CG5Z
M45913/3-4CG5Z ✓ 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 M45913/3-4CG5Z 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 5310-01-505-0239, 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
M45913/3-4CG5Z
NSN: 5310-01-505-0239
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM45913/3-4CG5Z
NSN5310-01-505-0239
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: M45913/3-4CG5Z · 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
•
NUT STYLE: HEXAGON
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
BEARING SURFACE FINISH: 125.0 MICROINCHES
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE-J995, GRADE 5 OR 8 ASSN STD SINGLE MATERIAL RESPONSE NUT
•
SURFACE TREATMENT: CADMIUM AND ZINC OVERALL
•
MATERIAL: STEEL NUT
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B
NUT STYLEHEXAGON
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NOMINAL THREAD SIZE0.250 INCHES IN
BEARING SURFACE FINISH125.0 MICROINCHES
MATERIAL DOCUMENT AND CLASSIFICATIONSAE-J995, GRADE 5 OR 8 ASSN STD SINGLE MATERIAL RESPONSE NUT
SURFACE TREATMENTCADMIUM AND ZINC OVERALL
MATERIALSTEEL NUT
MATERIALPLASTIC POLYAMIDE NYLON LOCKING INSERT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM-B633, TYPE II ASSN STD SINGLE TREATMENT RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
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 M45913/3-4CG5Z?
M45913/3-4CG5Z is a M45913/3-4CG5Z.
What parts can replace M45913/3-4CG5Z?
There are 16 known substitutes for M45913/3-4CG5Z: MIL-DTL-45913/3, M45913/3-16FG8C, MS51943-50 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M45913/3-4CG5Z?
M45913/3-4CG5Z is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-505-0239. 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