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221786W — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

221786W: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include special_features: WASHER,SWING GEAR; HARD WASHER 1-1/2 INCHES ID IN, end_item_identification: CRANE BUOY HANDLING, PART NUMBER TB90-60/1771 ABOARD 225 FT WLB COAST GUARD VESSELS FT. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-505-9371, 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
221786W
NSN: 5310-01-505-9371
FSC: 5310 — Nuts and Washers
CAGE: 60848 — ALLIED SYSTEMS COMPANY DBA ALLIED SYSTEMS CO (USA)
SPECIFICATIONS
special_featuresWASHER,SWING GEAR; HARD WASHER 1-1/2 INCHES ID IN
end_item_identificationCRANE BUOY HANDLING, PART NUMBER TB90-60/1771 ABOARD 225 FT WLB COAST GUARD VESSELS FT
NSN5310-01-505-9371
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 221786W · 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
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESWASHER,SWING GEAR; HARD WASHER 1-1/2 INCHES ID IN
END ITEM IDENTIFICATIONCRANE BUOY HANDLING, PART NUMBER TB90-60/1771 ABOARD 225 FT WLB COAST GUARD VESSELS FT
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 2
67492363Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
235560Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 221786W?
221786W is a WASHER,FLAT.
What parts can replace 221786W?
There are 2 known substitutes for 221786W: 67492363, 235560. Substitute compatibility should be verified for your specific system.
What is the NSN for 221786W?
221786W is cataloged in the U.S. Government catalog under NSN 5310-01-505-9371. 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.