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Technical Data Sheet
PartsTable / COMPONENT / ESP-F-15.321-NPP
ESP-F-15.321-NPP ✓ 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 ESP-F-15.321-NPP is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-346-9431, 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
ESP-F-15.321-NPP
NSN: 5310-01-346-9431
FSC: 5310
CAGE: 338X5 — ND DEFENSE LLC (USA)
SPECIFICATIONS
Part NumberESP-F-15.321-NPP
NSN5310-01-346-9431
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: ESP-F-15.321-NPP · 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 9
22237R1Interchangeable
interchangeable cross-reference
interchangeable
ESP-F-15.321-NPPInterchangeable
interchangeable cross-reference
interchangeable
21739R1Interchangeable
interchangeable cross-reference
interchangeable
33619Interchangeable
interchangeable cross-reference
interchangeable
12759-00481Interchangeable
interchangeable cross-reference
interchangeable
22042R1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ESP-F-15.321-NPP?
ESP-F-15.321-NPP is a ESP-F-15.321-NPP.
What parts can replace ESP-F-15.321-NPP?
There are 9 known substitutes for ESP-F-15.321-NPP: 22237R1, ESP-F-15.321-NPP, 21739R1 and 6 more. Substitute compatibility should be verified for your specific system.
Is ESP-F-15.321-NPP still available?
ESP-F-15.321-NPP is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026