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21C801-004 — WASHER,SADDLE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

21C801-004: WASHER,SADDLE.

The WASHER,SADDLE is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5310-00-330-5065, 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
21C801-004
NSN: 5310-00-330-5065
FSC: 5310 — Nuts and Washers
CAGE: 04660 — AIL SYSTEMS INC SUB OF EATON CORP (USA)
SPECIFICATIONS
Part Number21C801-004
NSN5310-00-330-5065
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 21C801-004 · 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
SUBSTITUTES & CROSS-REFERENCES 9
4810-1-138-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
54B7288H04Reference document
Same NSN cross-reference
Reference document — Secondary reference
8087023Reference document
Same NSN cross-reference
Reference document — Secondary reference
1734-7293Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
9170406-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
2027041-0704Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21C801-004?
21C801-004 is a WASHER,SADDLE.
What parts can replace 21C801-004?
There are 9 known substitutes for 21C801-004: 4810-1-138-1, 54B7288H04, 8087023 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21C801-004?
21C801-004 is cataloged in the U.S. Government catalog under NSN 5310-00-330-5065. 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.