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2155-371 PIECE 21 — WASHER

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2155-371 PIECE 21: WASHER.

The WASHER is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5310-01-266-4899, 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
2155-371 PIECE 21
NSN: 5310-01-266-4899
FSC: 5310 — Nuts and Washers
CAGE: 43689 — HUNTINGTON INGALLS INC DIV NEWPORT NEWS SHIPBUILDING (USA)
SPECIFICATIONS
Part Number2155-371 PIECE 21
NSN5310-01-266-4899
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2155-371 PIECE 21 · 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
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 3
701-6938582 SH 4 PC 58Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
701-6938562 SH 1 PC 41Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
701-5941244 SH 4 PC 6Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2155-371 PIECE 21?
2155-371 PIECE 21 is a WASHER.
What parts can replace 2155-371 PIECE 21?
There are 3 known substitutes for 2155-371 PIECE 21: 701-6938582 SH 4 PC 58, 701-6938562 SH 1 PC 41, 701-5941244 SH 4 PC 6. Substitute compatibility should be verified for your specific system.
What is the NSN for 2155-371 PIECE 21?
2155-371 PIECE 21 is cataloged in the U.S. Government catalog under NSN 5310-01-266-4899. 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.