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Technical Data Sheet
PartsTable / COMPONENT / 82418
82418 ✓ 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 WASHER,FLAT is a the manufacturer industrial component. Key specifications include length: 0.459 INCHES NOMINAL IN, diameter: 0.250 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING OVERALL, thread_class: 2B RIGHT INTERNAL, thread_length: 0.459 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN, style_designator: LEFT INTERNAL AND RIGHT INTERNAL THREADS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-144-9402, 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
82418
NSN: 5310-01-144-9402
FSC: 5310
CAGE: 03487 — ANDREA ELECTRONICS CORPORATION (USA)
SPECIFICATIONS
length0.459 INCHES NOMINAL IN
diameter0.250 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING OVERALL
thread_class2B RIGHT INTERNAL
thread_length0.459 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
style_designatorLEFT INTERNAL AND RIGHT INTERNAL THREADS
thread_directionRIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD)
nominal_thread_size0.250 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) IN
cross-sectional_shapeROUND
end_item_identificationUSED ON THE DE-ICE CONTROL
thread_quantity_per_inch40 LEFT INTERNAL (INCLUDES THRU THREAD)
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) LEFT INTERNAL (INCLUDES THRU THREAD)
NSN5310-01-144-9402
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 82418 · 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
•
OVERALL DIAMETER: 0.625 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625 TY II MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SURFACE TREATMENT: ANODIZE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: ALUMINUM ALLOY 6061 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-325 T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THICKNESS: 0.090 INCHES NOMINAL IN
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER0.625 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 TY II MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTANODIZE OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALALUMINUM ALLOY 6061 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-325 T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THICKNESS0.090 INCHES NOMINAL IN
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.500 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
82418-1-1-1-.459Interchangeable
interchangeable cross-reference
interchangeable
82418Interchangeable
interchangeable cross-reference
interchangeable
65809Interchangeable
interchangeable cross-reference
interchangeable
C21-5002-001Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 82418?
82418 is a WASHER,FLAT.
What parts can replace 82418?
There are 4 known substitutes for 82418: 82418-1-1-1-.459, 82418, 65809 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 82418?
82418 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-144-9402. 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