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419366-5 ✓ 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 material: STEEL COMP 1340H OR STEEL COMP 303SE OVERALL, thickness: 0.011 INCHES MINIMUM AND 0.013 INCHES MAXIMUM IN, hole_diameter: 0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN, overall_diameter: 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN, surface_treatment: PASSIVATE OVERALL, peripheral_shape_style: ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-122-5623, 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
419366-5
NSN: 5310-01-122-5623
FSC: 5310
CAGE: 96214 — RAYTHEON COMPANY DBA RAYTHEON (USA)
SPECIFICATIONS
materialSTEEL COMP 1340H OR STEEL COMP 303SE OVERALL
thickness0.011 INCHES MINIMUM AND 0.013 INCHES MAXIMUM IN
hole_diameter0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
overall_diameter0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
surface_treatmentPASSIVATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationASTM A582 ASSN STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-122-5623
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 419366-5 · 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: 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL: STEEL COMP 1340H OR STEEL COMP 303SE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A582 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
THICKNESS: 0.011 INCHES MINIMUM AND 0.013 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALSTEEL COMP 1340H OR STEEL COMP 303SE OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582 ASSN STD ALL MATERIAL RESPONSES OVERALL
CENTER HOLE SHAPE STYLEROUND
THICKNESS0.011 INCHES MINIMUM AND 0.013 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
103726-37Interchangeable
interchangeable cross-reference
interchangeable
A3-26Interchangeable
interchangeable cross-reference
interchangeable
SS1-28Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 419366-5?
419366-5 is a WASHER,FLAT.
What parts can replace 419366-5?
There are 3 known substitutes for 419366-5: 103726-37, A3-26, SS1-28. Substitute compatibility should be verified for your specific system.
What is the NSN for 419366-5?
419366-5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-122-5623. 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