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311904-19 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

311904-19: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, seat_radius: 0.0781 INCHES NOMINAL IN, flange_diameter: 0.374 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN, style_designator: PLAIN FLANGED, surface_treatment: PASSIVATE OVERALL, under_flange_height: 0.105 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 4810-00-009-0424, 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
311904-19
NSN: 4810-00-009-0424
FSC: 4810 — Valves, Powered
CAGE: 59364 — HONEYWELL INTERNATIONAL INC. DBA HONEYWELL INTERNATIONAL DIV AEROSPACE - TEMPE (WEST WARNER ROAD) (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
seat_radius0.0781 INCHES NOMINAL IN
flange_diameter0.374 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
style_designatorPLAIN FLANGED
surface_treatmentPASSIVATE OVERALL
under_flange_height0.105 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
body_inside_diameter0.114 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN
fsc_application_dataVALVE,TEMPERATURE,CONTROL SYSTEM
body_outside_diameter0.264 INCHES MINIMUM AND 0.269 INCHES MAXIMUM IN
seating_surface_shapeRADIAL
flange_seat_to_disk_end_height0.035 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-764 TYPE 303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4810-00-009-0424
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 311904-19 · 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
•
FLANGE SEAT TO DISK END HEIGHT: 0.035 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN
•
FLANGE DIAMETER: 0.374 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
FSC APPLICATION DATA: VALVE,TEMPERATURE,CONTROL SYSTEM
•
BODY OUTSIDE DIAMETER: 0.264 INCHES MINIMUM AND 0.269 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: PLAIN FLANGED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764 TYPE 303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
BODY INSIDE DIAMETER: 0.114 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN
•
SEAT RADIUS: 0.0781 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.035 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN
FLANGE DIAMETER0.374 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
FSC APPLICATION DATAVALVE,TEMPERATURE,CONTROL SYSTEM
BODY OUTSIDE DIAMETER0.264 INCHES MINIMUM AND 0.269 INCHES MAXIMUM IN
STYLE DESIGNATORPLAIN FLANGED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764 TYPE 303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
BODY INSIDE DIAMETER0.114 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN
SEAT RADIUS0.0781 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
UNDER FLANGE HEIGHT0.105 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
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 311904-19?
311904-19 is a SEAT,VALVE.
What is the NSN for 311904-19?
311904-19 is cataloged in the U.S. Government catalog under NSN 4810-00-009-0424. 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.