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PartsTable / COMPONENT / MS20364-820
MS20364-820 ✓ 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: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN, temp_rating: 250.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNF. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-275-2042, 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
MS20364-820
NSN: 5310-00-275-2042
FSC: 5310
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
temp_rating250.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNF
locking_featurePREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OR ZINC OVERALL
width_across_flats0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
nominal_thread_size0.500 INCHES IN
bearing_surface_typeFLAT
NSN5310-00-275-2042
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS20364-820 · 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
•
WIDTH ACROSS FLATS: 0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
•
THREAD QUANTITY PER INCH: 20
•
THREAD SERIES: UNF
•
BEARING SURFACE TYPE: FLAT
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH ACROSS FLATS0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH20
THREAD SERIESUNF
BEARING SURFACE TYPEFLAT
NOMINAL THREAD SIZE0.500 INCHES IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT
NUT STYLEHEXAGON
THREAD CLASS3B
TEMP RATING250.0 FAHRENHEIT NOMINAL DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
W58XC4C12A-5Interchangeable
interchangeable cross-reference
interchangeable
1601-013-5Interchangeable
interchangeable cross-reference
interchangeable
607417-5Interchangeable
interchangeable cross-reference
interchangeable
853948Interchangeable
interchangeable cross-reference
interchangeable
17962MInterchangeable
interchangeable cross-reference
interchangeable
648392Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS20364-820?
MS20364-820 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace MS20364-820?
There are 14 known substitutes for MS20364-820: W58XC4C12A-5, 1601-013-5, 607417-5 and 11 more. Substitute compatibility should be verified for your specific system.
Is MS20364-820 still available?
MS20364-820 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