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Technical Data Sheet
PartsTable / COMPONENT / 6853519 ITEM NO. 18
6853519 ITEM NO. 18 ✓ 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 6853519 ITEM NO. 18 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-253-3207, 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
6853519 ITEM NO. 18
NSN: 5310-00-253-3207
FSC: 5310
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
Part Number6853519 ITEM NO. 18
NSN5310-00-253-3207
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6853519 ITEM NO. 18 · 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
•
NONDEFINITIVE SPEC/STD DATA: A TYPE AND 1 GRADE AND G CLASS
•
MATERIAL: COPPER ALLOY OVERALL
•
OVERALL DIAMETER: 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.214 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
THICKNESS: 0.036 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATAA TYPE AND 1 GRADE AND G CLASS
MATERIALCOPPER ALLOY OVERALL
OVERALL DIAMETER0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
HOLE DIAMETER0.214 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEROUND
THICKNESS0.036 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
PERIPHERAL SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
04-649Interchangeable
interchangeable cross-reference
interchangeable
034-649Interchangeable
interchangeable cross-reference
interchangeable
804228Interchangeable
interchangeable cross-reference
interchangeable
1-4X7-8X364Interchangeable
interchangeable cross-reference
interchangeable
430771Interchangeable
interchangeable cross-reference
interchangeable
FFW92TYPEAGRADE2CLASSEInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6853519 ITEM NO. 18?
6853519 ITEM NO. 18 is a 6853519 ITEM NO. 18.
What parts can replace 6853519 ITEM NO. 18?
There are 22 known substitutes for 6853519 ITEM NO. 18: 04-649, 034-649, 804228 and 19 more. Substitute compatibility should be verified for your specific system.
Is 6853519 ITEM NO. 18 still available?
6853519 ITEM NO. 18 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