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11781518 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

11781518: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, recess_angle: 100.0 DEGREES NOMINAL, hole_diameter: 0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN, recess_diameter: 0.169 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN, outside_diameter: 0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN, style_designator: RECESSED. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-074-4500, 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
11781518
NSN: 5310-01-074-4500
FSC: 5310 — Nuts and Washers
CAGE: 19200 — COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV LOGISTICS RESEARCH AND ENGINEERING DIRECTORATE (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
recess_angle100.0 DEGREES NOMINAL
hole_diameter0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
recess_diameter0.169 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN
outside_diameter0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN
style_designatorRECESSED
surface_treatmentPASSIVATE OVERALL
material_thickness0.037 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN
end_item_identificationFC COMPUTER
material_document_and_classificationQQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-S-5002 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-074-4500
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 11781518 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-S-5002 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.037 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN
•
RECESS DIAMETER: 0.169 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-S-5002 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN
MATERIAL THICKNESS0.037 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN
RECESS DIAMETER0.169 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
END ITEM IDENTIFICATIONFC COMPUTER
MATERIALSTEEL COMP 303 OVERALL
HOLE DIAMETER0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
8011204-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 11781518?
11781518 is a WASHER,RECESSED.
What parts can replace 11781518?
There is 1 known substitute for 11781518: 8011204-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 11781518?
11781518 is cataloged in the U.S. Government catalog under NSN 5310-01-074-4500. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.