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0635-10-880-2101 — VALVE,CHECK

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

0635-10-880-2101: VALVE,CHECK.

The VALVE,CHECK is a the manufacturer industrial component. Key specifications include special_features: CRITICAL APPLICATION ITEM (CAI); PART OF DRIVE SYSTEMS (HELO ONLY) MAIN GEARBOX, end_item_identification: CH-53K SIKORSKY HEAVY LIFT HELICOPTER, criticality_code_justification: FEAT, part_name_assigned_by_controlling_agency: CHECK VALVE, AUX LUBE. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-666-5225, 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
0635-10-880-2101
NSN: 4820-01-666-5225
FSC: 4820 — Valves, Nonpowered
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
special_featuresCRITICAL APPLICATION ITEM (CAI); PART OF DRIVE SYSTEMS (HELO ONLY) MAIN GEARBOX
end_item_identificationCH-53K SIKORSKY HEAVY LIFT HELICOPTER
criticality_code_justificationFEAT
part_name_assigned_by_controlling_agencyCHECK VALVE, AUX LUBE
NSN4820-01-666-5225
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 0635-10-880-2101 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CRITICALITY CODE JUSTIFICATION: FEAT
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONFEAT
SPECIAL FEATURESCRITICAL APPLICATION ITEM (CAI); PART OF DRIVE SYSTEMS (HELO ONLY) MAIN GEARBOX
PART NAME ASSIGNED BY CONTROLLING AGENCYCHECK VALVE, AUX LUBE
END ITEM IDENTIFICATIONCH-53K SIKORSKY HEAVY LIFT HELICOPTER
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 0635-10-880-2101?
0635-10-880-2101 is a VALVE,CHECK.
What is the NSN for 0635-10-880-2101?
0635-10-880-2101 is cataloged in the U.S. Government catalog under NSN 4820-01-666-5225. 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.