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Technical Data Sheet

88303 PC NO 21 — Technical Data Sheet

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— · 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 WASHER,LOCK is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System under NSN 5310-01-449-7387, 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
88303 PC NO 21
NSN: 5310-01-449-7387
FSC: 5310
CAGE: 50380 — RELIANCE ELECTRIC (USA)
SPECIFICATIONS
Part Number88303 PC NO 21
NSN5310-01-449-7387
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 88303 PC NO 21 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
106265InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
W12InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
N6460KInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
A997CPC30AInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
35518PC14InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
D6991REVBPC33InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 88303 PC NO 21?
88303 PC NO 21 is a WASHER,LOCK.
What parts can replace 88303 PC NO 21?
There are 11 known substitutes for 88303 PC NO 21: 106265, W12, N6460K and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 88303 PC NO 21?
88303 PC NO 21 is cataloged in the Federal Logistics Information System under NSN 5310-01-449-7387. This indicates validated use in U.S. government and defense supply chains.
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