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3011420 ✓ 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 SEAL,CONNECTOR,SPEC is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-557-0545, 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
3011420
NSN: 5310-01-557-0545
FSC: 5310
CAGE: 57550 — RELLI TECHNOLOGY, INC DBA RELLI TECHNOLOGY INC (USA)
SPECIFICATIONS
Part Number3011420
NSN5310-01-557-0545
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3011420 · 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 21
3011417Interchangeable
interchangeable cross-reference
interchangeable
122756AInterchangeable
interchangeable cross-reference
interchangeable
12759-00623Interchangeable
interchangeable cross-reference
interchangeable
3011418Interchangeable
interchangeable cross-reference
interchangeable
3011413Interchangeable
interchangeable cross-reference
interchangeable
12759-00749Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3011420?
3011420 is a SEAL,CONNECTOR,SPEC.
What parts can replace 3011420?
There are 21 known substitutes for 3011420: 3011417, 122756A, 12759-00623 and 18 more. Substitute compatibility should be verified for your specific system.
Is 3011420 still available?
3011420 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