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MC4554 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

MC4554: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, seat_angle_in_deg: 45.000 NOMINAL, surface_treatment: PASSIVATE OVERALL, fsc_application_data: CYLINDER,BRAKE,MASTER,AIRCRAFT, seating_surface_shape: ANGULAR, seal_accommodation_type: RECESSED. This part is cataloged in the U.S.

Government catalog under NSN 4810-00-788-8908, 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
MC4554
NSN: 4810-00-788-8908
FSC: 4810 — Valves, Powered
CAGE: 76050 — EATON AEROSPACE LLC DBA STERER ENGINEERING DIV M.C.AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
seat_angle_in_deg45.000 NOMINAL
surface_treatmentPASSIVATE OVERALL
fsc_application_dataCYLINDER,BRAKE,MASTER,AIRCRAFT
seating_surface_shapeANGULAR
seal_accommodation_typeRECESSED
material_document_and_classificationFED STD 66,AISI 303/SAE 30303 FED STD SINGLE MATERIAL RESPONSE OVERALL
NSN4810-00-788-8908
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: MC4554 · 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
•
FSC APPLICATION DATA: CYLINDER,BRAKE,MASTER,AIRCRAFT
•
SEAL ACCOMMODATION TYPE: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66,AISI 303/SAE 30303 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL: STEEL OVERALL
•
SEAT ANGLE IN DEG: 45.000 NOMINAL
•
SEATING SURFACE SHAPE: ANGULAR
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATACYLINDER,BRAKE,MASTER,AIRCRAFT
SEAL ACCOMMODATION TYPERECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66,AISI 303/SAE 30303 FED STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL OVERALL
SEAT ANGLE IN DEG45.000 NOMINAL
SEATING SURFACE SHAPEANGULAR
OTHER ITEMS IN FSC 4810 — Valves, Powered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4810-00-001-1247 4810-00-001-4499 4810-00-001-4531 4810-00-001-4532 4810-00-001-4554 4810-00-001-4555 4810-00-001-4556 4810-00-001-4611
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 MC4554?
MC4554 is a SEAT,VALVE.
What is the NSN for MC4554?
MC4554 is cataloged in the U.S. Government catalog under NSN 4810-00-788-8908. 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.