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PartsTable / COMPONENT / 503351
503351 ✓ 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

CABLE ASSEMBLY,SPECIAL PURPOSE,E. Key specifications include material: CERAMIC, nut_height: 0.453 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, locking_feature: PREVAILING TORQUE WITH NONMETALLIC INSERT, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-050-3351, 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
503351
NSN: 5310-00-050-3351
FSC: 5310
CAGE: 21450 — ARMY WEAPONS COMMAND ATTN AMSWE-REE-S (USA)
SPECIFICATIONS
nut_height0.453 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OR ZINC OVERALL
width_across_flats0.563 INCHES NOMINAL IN
nominal_thread_size0.375 INCHES IN
end_item_identificationAIM-9 (SIDEWINDER); NHA AIM-9L/M TEST SET
thread_quantity_per_inch24
material_document_and_classificationQQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-050-3351
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 503351 · 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 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
TYPICAL APPLICATIONS
  • Server Internal Cabling
  • Data Center Cable Infrastructure
  • SAS/SATA Drive Connectivity
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 503351?
503351 is a CABLE ASSEMBLY,SPECIAL PURPOSE,E.
What parts can replace 503351?
There are 19 known substitutes for 503351: 52NE064, 22E064, 2F8616 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 503351?
503351 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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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026