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Technical Data Sheet
PartsTable / COMPONENT / AN363-624
AN363-624 ✓ 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: 0.318 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN, lubrication: SOLUBLE LUBRICANT, temp_rating: 450.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-281-3389, 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
AN363-624
NSN: 5310-00-281-3389
FSC: 5310
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.318 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
lubricationSOLUBLE LUBRICANT
temp_rating450.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
countersink_angle88.0 DEGREES NOMINAL NUT
surface_treatmentCADMIUM OVERALL
width_across_flats0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN
NSN5310-00-281-3389
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AN363-624 · 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
•
WIDTH ACROSS FLATS: 0.553 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN
•
TEMP RATING: 550.0 FAHRENHEIT NOMINAL DEGF
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
BEARING SURFACE TYPE: FLAT
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
NUT HEIGHT: 0.437 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B
WIDTH ACROSS FLATS0.553 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN
TEMP RATING550.0 FAHRENHEIT NOMINAL DEGF
MATERIALSTEEL OVERALL
SURFACE TREATMENTCADMIUM OVERALL
BEARING SURFACE TYPEFLAT
NOMINAL THREAD SIZE0.375 INCHES IN
NUT HEIGHT0.437 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH24
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
21FC624Interchangeable
interchangeable cross-reference
interchangeable
145440Interchangeable
interchangeable cross-reference
interchangeable
52HS019-624Interchangeable
interchangeable cross-reference
interchangeable
22FH-624Interchangeable
interchangeable cross-reference
interchangeable
2016151 ITEM 5Interchangeable
interchangeable cross-reference
interchangeable
27FH-624Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN363-624?
AN363-624 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace AN363-624?
There are 9 known substitutes for AN363-624: 21FC624, 145440, 52HS019-624 and 6 more. Substitute compatibility should be verified for your specific system.
Is AN363-624 still available?
AN363-624 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