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90377A184 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

90377A184: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.08 INCHES NOMINAL IN, overall_diameter: 1.25 INCHES NOMINAL IN, special_features: THESE HAVE EXAGGERATED OUTSIDE DIAMETERS AND/OR THICKNESS, surface_treatment: OXIDE OVERALL, end_item_identification: KC-46A TANKER SUPPORT EQUIPMENT A. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-660-8707, 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
90377A184
NSN: 5310-01-660-8707
FSC: 5310 — Nuts and Washers
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.08 INCHES NOMINAL IN
overall_diameter1.25 INCHES NOMINAL IN
special_featuresTHESE HAVE EXAGGERATED OUTSIDE DIAMETERS AND/OR THICKNESS
surface_treatmentOXIDE OVERALL
end_item_identificationKC-46A TANKER SUPPORT EQUIPMENT A
NSN5310-01-660-8707
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 90377A184 · 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: 1.25 INCHES NOMINAL IN
•
COLOR: BLACK OVERALL
•
SURFACE TREATMENT: OXIDE OVERALL
•
MATERIAL: STEEL OVERALL
•
THICKNESS: 0.08 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER1.25 INCHES NOMINAL IN
COLORBLACK OVERALL
SPECIAL FEATURESTHESE HAVE EXAGGERATED OUTSIDE DIAMETERS AND/OR THICKNESS
SURFACE TREATMENTOXIDE OVERALL
END ITEM IDENTIFICATIONKC-46A TANKER SUPPORT EQUIPMENT A
MATERIALSTEEL OVERALL
THICKNESS0.08 INCHES NOMINAL 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

No substitute or cross-reference records for this part.

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 90377A184?
90377A184 is a WASHER,FLAT.
What is the NSN for 90377A184?
90377A184 is cataloged in the U.S. Government catalog under NSN 5310-01-660-8707. 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.