PartsTable
Technical Data Sheet
66780 ✓ Verified by PartsTable
Clementoni · 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

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Bacteria, in the form of microbes, can lead to an array of problems, including bad odours, product and surface stains, a reduced product lifetime and more. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-050-3351, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
66780
NSN: 5310-00-050-3351
FSC: 5310
CAGE: 58464 — SHELLER-GLOBE CORP SUPERIOR-LIMA DIV (USA)
SPECIFICATIONS
vehicle_design_control_activity12204
NSN5310-00-050-3351
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 66780 · Clementoni ⚠ 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 WITH NONMETALLIC INSERT
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD QUANTITY PER INCH: 24
NOMINAL THREAD SIZE: 0.375 INCHES IN
THREAD SERIES: UNF
WIDTH ACROSS FLATS: 0.563 INCHES NOMINAL IN
THREAD DIRECTION: RIGHT-HAND
NUT HEIGHT: 0.453 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD QUANTITY PER INCH24
NOMINAL THREAD SIZE0.375 INCHES IN
THREAD SERIESUNF
WIDTH ACROSS FLATS0.563 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.453 INCHES NOMINAL IN
THREAD CLASS3B
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
52NE064Interchangeable
interchangeable cross-reference
interchangeable
22E064Interchangeable
interchangeable cross-reference
interchangeable
2F8616Interchangeable
interchangeable cross-reference
interchangeable
53957Interchangeable
interchangeable cross-reference
interchangeable
4171588-709Interchangeable
interchangeable cross-reference
interchangeable
719283-223Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 66780?
66780 is a BOOT,VEHICULAR COMPONENTS manufactured by Clementoni.
What parts can replace 66780?
There are 19 known substitutes for 66780: 52NE064, 22E064, 2F8616 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 66780?
66780 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-050-3351. This indicates validated use in U.S. government and defense supply chains.
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