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6509918 ✓ 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 OVERALL, thickness: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN, hole_diameter: 0.695 INCHES MINIMUM AND 0.715 INCHES MAXIMUM IN, overall_diameter: 1.125 INCHES MINIMUM AND 1.150 INCHES MAXIMUM IN, surface_treatment: CADMIUM 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 5310-01-372-3948, 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
6509918
NSN: 5310-01-372-3948
FSC: 5310
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
hole_diameter0.695 INCHES MINIMUM AND 0.715 INCHES MAXIMUM IN
overall_diameter1.125 INCHES MINIMUM AND 1.150 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-01-372-3948
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6509918 · 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: 1.125 INCHES MINIMUM AND 1.150 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.695 INCHES MINIMUM AND 0.715 INCHES MAXIMUM IN
•
THICKNESS: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER1.125 INCHES MINIMUM AND 1.150 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
SURFACE TREATMENTCADMIUM OVERALL
PERIPHERAL SHAPE STYLEROUND
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.695 INCHES MINIMUM AND 0.715 INCHES MAXIMUM IN
THICKNESS0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
58,000Interchangeable
interchangeable cross-reference
interchangeable
58000Interchangeable
interchangeable cross-reference
interchangeable
S8020Interchangeable
interchangeable cross-reference
interchangeable
NDC00264-1802-00Interchangeable
interchangeable cross-reference
interchangeable
40548 PIECE 42Interchangeable
interchangeable cross-reference
interchangeable
40548Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6509918?
6509918 is a WASHER,FLAT.
What parts can replace 6509918?
There are 9 known substitutes for 6509918: 58,000, 58000, S8020 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6509918?
6509918 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-372-3948. 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