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C18019 ✓ 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: PLASTIC POLYAMIDE NYLON OVERALL, thickness: 0.062 INCHES NOMINAL IN, hole_diameter: 0.145 INCHES NOMINAL IN, overall_diameter: 0.250 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_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 5310-01-197-4480, 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
C18019
NSN: 5310-01-197-4480
FSC: 5310
CAGE: 23050 — PRODUCT COMPONENTS CORPORATION (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON OVERALL
thickness0.062 INCHES NOMINAL IN
hole_diameter0.145 INCHES NOMINAL IN
overall_diameter0.250 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationASTM D4066 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-197-4480
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: C18019 · 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
•
MATERIAL: PLASTIC POLYAMIDE NYLON OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM D4066 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OVERALL DIAMETER: 0.250 INCHES NOMINAL IN
•
THICKNESS: 0.062 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.145 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALPLASTIC POLYAMIDE NYLON OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM D4066 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OVERALL DIAMETER0.250 INCHES NOMINAL IN
THICKNESS0.062 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.145 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
5026CInterchangeable
interchangeable cross-reference
interchangeable
10144Interchangeable
interchangeable cross-reference
interchangeable
MA1591Interchangeable
interchangeable cross-reference
interchangeable
33-60Interchangeable
interchangeable cross-reference
interchangeable
A-A-52490Interchangeable
interchangeable cross-reference
interchangeable
5L360-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C18019?
C18019 is a WASHER,FLAT.
What parts can replace C18019?
There are 22 known substitutes for C18019: 5026C, 10144, MA1591 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C18019?
C18019 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-197-4480. 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