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PartsTable / COMPONENT / M45938/1-12C
M45938/1-12C ✓ 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 M45938/1-12C is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-231-3858, 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
M45938/1-12C
NSN: 5310-01-231-3858
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM45938/1-12C
NSN5310-01-231-3858
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: M45938/1-12C · 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
•
PILOT DIAMETER: 0.207 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
THREAD QUANTITY PER INCH: 32
•
NOMINAL THREAD SIZE: 0.164 INCHES IN
•
HARDNESS RATING: 70.0 ROCKWELL B NOMINAL
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
NUT STYLE: CLINCH
TECHNICAL CHARACTERISTICS (FLIS)
PILOT DIAMETER0.207 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTPASSIVATE OVERALL
THREAD QUANTITY PER INCH32
NOMINAL THREAD SIZE0.164 INCHES IN
HARDNESS RATING70.0 ROCKWELL B NOMINAL
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NUT STYLECLINCH
PILOT LENGTH0.033 INCHES MINIMUM AND 0.038 INCHES MAXIMUM IN
NUT HEIGHT0.117 INCHES MINIMUM AND 0.142 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
MIL-N-45938/11Interchangeable
interchangeable cross-reference
interchangeable
M45938/11-2CInterchangeable
interchangeable cross-reference
interchangeable
CLS832-1Interchangeable
interchangeable cross-reference
interchangeable
2979Interchangeable
interchangeable cross-reference
interchangeable
832NKS-(0.032)Interchangeable
Same NIIN cross-reference
interchangeable
MIL-N-45938/1-12CInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M45938/1-12C?
M45938/1-12C is a M45938/1-12C.
What parts can replace M45938/1-12C?
There are 8 known substitutes for M45938/1-12C: MIL-N-45938/11, M45938/11-2C, CLS832-1 and 5 more. Substitute compatibility should be verified for your specific system.
Is M45938/1-12C still available?
M45938/1-12C is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026