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Technical Data Sheet
PartsTable / COMPONENT / 218-09-05
218-09-05 ✓ 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: WOOL OVERALL, thickness: 0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN, hole_diameter: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN, overall_diameter: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM 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 5310-00-725-3103, 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
218-09-05
NSN: 5310-00-725-3103
FSC: 5310
CAGE: 55268 — KARYL MFG INC (USA)
SPECIFICATIONS
materialWOOL OVERALL
thickness0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
hole_diameter0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
overall_diameter0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-725-3103
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 218-09-05 · 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
•
CENTER HOLE SHAPE STYLE: ROUND
•
MATERIAL: WOOL OVERALL
•
OVERALL DIAMETER: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
THICKNESS: 0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE SHAPE STYLEROUND
MATERIALWOOL OVERALL
OVERALL DIAMETER0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
HOLE DIAMETER0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
THICKNESS0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
PERIPHERAL SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
200-049Interchangeable
interchangeable cross-reference
interchangeable
311-00342Interchangeable
interchangeable cross-reference
interchangeable
DM15-200JInterchangeable
interchangeable cross-reference
interchangeable
0200049Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 218-09-05?
218-09-05 is a WASHER,FLAT.
What parts can replace 218-09-05?
There are 4 known substitutes for 218-09-05: 200-049, 311-00342, DM15-200J and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 218-09-05?
218-09-05 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-725-3103. 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