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PartsTable / COMPONENT / M24129-4-12C
M24129-4-12C ✓ 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 NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON LOCKING INSERT, nut_style: HEXAGON, nut_height: 0.688 INCHES MINIMUM AND 0.718 INCHES MAXIMUM IN, temp_rating: 250.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL COARSE (UNC). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-584-7993, 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
M24129-4-12C
NSN: 5310-00-584-7993
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON LOCKING INSERT
nut_styleHEXAGON
nut_height0.688 INCHES MINIMUM AND 0.718 INCHES MAXIMUM IN
temp_rating250.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE NUT
width_across_flats1.231 INCHES MINIMUM AND 1.255 INCHES MAXIMUM IN
nominal_thread_size0.750 INCHES IN
thread_quantity_per_inch10
NSN5310-00-584-7993
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: M24129-4-12C · 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
•
SURFACE TREATMENT: PASSIVATE NUT
•
THREAD QUANTITY PER INCH: 10
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
•
NUT STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH ACROSS FLATS: 1.231 INCHES MINIMUM AND 1.255 INCHES MAXIMUM IN
•
THREAD CLASS: 3B
•
MATERIAL: STEEL CORROSION RESISTING NUT
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTPASSIVATE NUT
THREAD QUANTITY PER INCH10
NOMINAL THREAD SIZE0.750 INCHES IN
NUT STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH ACROSS FLATS1.231 INCHES MINIMUM AND 1.255 INCHES MAXIMUM IN
THREAD CLASS3B
MATERIALSTEEL CORROSION RESISTING NUT
NUT HEIGHT0.688 INCHES MINIMUM AND 0.718 INCHES MAXIMUM IN
MATERIALPLASTIC POLYAMIDE NYLON LOCKING INSERT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
M24129-4-10CInterchangeable
interchangeable cross-reference
interchangeable
MS16228-6Interchangeable
interchangeable cross-reference
interchangeable
79NTU101Interchangeable
interchangeable cross-reference
interchangeable
MS16228-3Interchangeable
interchangeable cross-reference
interchangeable
79NTU066Interchangeable
interchangeable cross-reference
interchangeable
M24129-4-6CInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M24129-4-12C?
M24129-4-12C is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace M24129-4-12C?
There are 16 known substitutes for M24129-4-12C: M24129-4-10C, MS16228-6, 79NTU101 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M24129-4-12C?
M24129-4-12C is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-584-7993. 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