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105A218 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

105A218: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: PLASTIC OVERALL, overall_height: 0.124 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN, style_designator: PLAIN, body_inside_diameter: 0.125 INCHES NOMINAL IN, fsc_application_data: BRAKE SYSTEM,AIRCRAFT, body_outside_diameter: 0.434 INCHES MINIMUM AND 0.436 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 4810-00-231-5500, 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
105A218
NSN: 4810-00-231-5500
FSC: 4810 — Valves, Powered
CAGE: 78385 — MEGGITT TROY INC (USA)
SPECIFICATIONS
materialPLASTIC OVERALL
overall_height0.124 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
style_designatorPLAIN
body_inside_diameter0.125 INCHES NOMINAL IN
fsc_application_dataBRAKE SYSTEM,AIRCRAFT
body_outside_diameter0.434 INCHES MINIMUM AND 0.436 INCHES MAXIMUM IN
seating_surface_shapeFLAT
material_document_and_classificationFM-1,E I DUPONT DE NEMOURS AND CO,INC MFR REF SINGLE MATERIAL RESPONSE OVERALL
NSN4810-00-231-5500
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 105A218 · 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: BRAKE SYSTEM,AIRCRAFT
•
BODY OUTSIDE DIAMETER: 0.434 INCHES MINIMUM AND 0.436 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL DOCUMENT AND CLASSIFICATION: FM-1,E I DUPONT DE NEMOURS AND CO,INC MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
BODY INSIDE DIAMETER: 0.125 INCHES NOMINAL IN
•
MATERIAL: PLASTIC OVERALL
•
SEATING SURFACE SHAPE: FLAT
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.124 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
FSC APPLICATION DATABRAKE SYSTEM,AIRCRAFT
BODY OUTSIDE DIAMETER0.434 INCHES MINIMUM AND 0.436 INCHES MAXIMUM IN
STYLE DESIGNATORPLAIN
MATERIAL DOCUMENT AND CLASSIFICATIONFM-1,E I DUPONT DE NEMOURS AND CO,INC MFR REF SINGLE MATERIAL RESPONSE OVERALL
BODY INSIDE DIAMETER0.125 INCHES NOMINAL IN
MATERIALPLASTIC OVERALL
SEATING SURFACE SHAPEFLAT
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 105A218?
105A218 is a SEAT,VALVE.
What is the NSN for 105A218?
105A218 is cataloged in the U.S. Government catalog under NSN 4810-00-231-5500. 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.