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Technical Data Sheet
66052N624 ✓ 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

NUT,SELF-LOCKING,SINGLE BALL SEA. Key specifications include material: STEEL COMP 601 OVERALL, nut_style: SINGLE BALL SEAT, DOUBLE HEXAGON, nut_height: 0.479 INCHES MINIMUM IN, lubrication: DRY FILM LUBRICANT, temp_rating: 450.0 FAHRENHEIT MAXIMUM DEGF, thread_class: 3B. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-791-9606, 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
66052N624
NSN: 5310-00-791-9606
FSC: 5310
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL COMP 601 OVERALL
nut_styleSINGLE BALL SEAT, DOUBLE HEXAGON
nut_height0.479 INCHES MINIMUM IN
lubricationDRY FILM LUBRICANT
temp_rating450.0 FAHRENHEIT MAXIMUM DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
locking_featurePREVAILING TORQUE ALL METAL DESIGN
ball_seat_radius0.456 INCHES NOMINAL IN
special_featuresCYLINDRICAL PROTRUSION ON ONE END
thread_directionRIGHT-HAND
surface_treatmentNICKEL AND CADMIUM OVERALL
NSN5310-00-791-9606
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 66052N624 · 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
NUT HEIGHT: 0.479 INCHES MINIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2416 ASSN STD ALL TREATMENT RESPONSES OVERALL
SPECIFICATION/STANDARD DATA: 76301-ST3-588 MANUFACTURERS STANDARD
MATERIAL: STEEL COMP 601 OVERALL
NOMINAL THREAD SIZE: 0.375 INCHES IN
TEMP RATING: 450.0 FAHRENHEIT MAXIMUM DEGF
TECHNICAL CHARACTERISTICS (FLIS)
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT0.479 INCHES MINIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2416 ASSN STD ALL TREATMENT RESPONSES OVERALL
SPECIAL FEATURESCYLINDRICAL PROTRUSION ON ONE END
SPECIFICATION/STANDARD DATA76301-ST3-588 MANUFACTURERS STANDARD
MATERIALSTEEL COMP 601 OVERALL
NOMINAL THREAD SIZE0.375 INCHES IN
TEMP RATING450.0 FAHRENHEIT MAXIMUM DEGF
THREAD CLASS3B
SURFACE TREATMENTNICKEL AND CADMIUM OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
2381-6Interchangeable
interchangeable cross-reference
interchangeable
ST3M588-6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 66052N624?
66052N624 is a NUT,SELF-LOCKING,SINGLE BALL SEA.
What parts can replace 66052N624?
There are 2 known substitutes for 66052N624: 2381-6, ST3M588-6. Substitute compatibility should be verified for your specific system.
What is the NSN for 66052N624?
66052N624 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-791-9606. This indicates validated use in U.S. government and defense supply chains.
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