PartsTable
Technical Data Sheet
52NU066 ✓ 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: PLASTIC POLYAMIDE NYLON LOCKING INSERT, nut_style: HEXAGON, nut_height: 0.469 INCHES MAXIMUM IN, lubrication: DRY FILM LUBRICANT, temp_rating: 250.0 FAHRENHEIT NOMINAL 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 5310-00-050-3275, 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
52NU066
NSN: 5310-00-050-3275
FSC: 5310
CAGE: 72962 — HARVARD INDUSTRIES INC (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON LOCKING INSERT
nut_styleHEXAGON
nut_height0.469 INCHES MAXIMUM IN
lubricationDRY FILM LUBRICANT
temp_rating250.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
hardness_rating26.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL EXCEPT INSERT
width_across_flats0.551 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN
NSN5310-00-050-3275
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 52NU066 · 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
NOMINAL THREAD SIZE: 0.375 INCHES IN
THREAD QUANTITY PER INCH: 16
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL: STEEL OVERALL
WIDTH ACROSS FLATS: 0.688 INCHES NOMINAL IN
NUT HEIGHT: 0.547 INCHES NOMINAL IN
LOCKING FEATURE: FREE-RUNNING ALL METAL DESIGN OR PREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE0.375 INCHES IN
THREAD QUANTITY PER INCH16
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
WIDTH ACROSS FLATS0.688 INCHES NOMINAL IN
NUT HEIGHT0.547 INCHES NOMINAL IN
LOCKING FEATUREFREE-RUNNING ALL METAL DESIGN OR PREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT
THREAD CLASS3B
NUT STYLEHEXAGON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
144178Interchangeable
interchangeable cross-reference
interchangeable
5315000820448Interchangeable
interchangeable cross-reference
interchangeable
P422Interchangeable
interchangeable cross-reference
interchangeable
TEMPRTAPEC1-2INInterchangeable
interchangeable cross-reference
interchangeable
101T1-2INX36YDInterchangeable
interchangeable cross-reference
interchangeable
403416Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 52NU066?
52NU066 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 52NU066?
There are 15 known substitutes for 52NU066: 144178, 5315000820448, P422 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 52NU066?
52NU066 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-050-3275. This indicates validated use in U.S. government and defense supply chains.
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