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Technical Data Sheet
PartsTable / COMPONENT / M45938/6-6C
M45938/6-6C ✓ 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 M45938/6-6C 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 5310-00-984-5543, 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
M45938/6-6C
NSN: 5310-00-984-5543
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM45938/6-6C
NSN5310-00-984-5543
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: M45938/6-6C · 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
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
NOMINAL THREAD SIZE: 0.138 INCHES IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
PILOT LENGTH: 0.060 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD CLASS: 3B
•
THREAD QUANTITY PER INCH: 32
TECHNICAL CHARACTERISTICS (FLIS)
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
NOMINAL THREAD SIZE0.138 INCHES IN
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL CORROSION RESISTING OVERALL
PILOT LENGTH0.060 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD CLASS3B
THREAD QUANTITY PER INCH32
PILOT DIAMETER0.199 INCHES NOMINAL IN
NUT STYLESPLINE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
1752101-3Interchangeable
interchangeable cross-reference
interchangeable
M45938-6-8Interchangeable
interchangeable cross-reference
interchangeable
MILN45938-6Interchangeable
interchangeable cross-reference
interchangeable
1752101-4Interchangeable
interchangeable cross-reference
interchangeable
M45938-6-6Interchangeable
interchangeable cross-reference
interchangeable
10121915Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M45938/6-6C?
M45938/6-6C is a M45938/6-6C.
What parts can replace M45938/6-6C?
There are 24 known substitutes for M45938/6-6C: 1752101-3, M45938-6-8, MILN45938-6 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M45938/6-6C?
M45938/6-6C is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-984-5543. 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