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1S-473-5-4 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

1S-473-5-4: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, overall_height: 1.500 INCHES NOMINAL IN, style_designator: PLAIN THREADED, body_inside_diameter: 27.750 INCHES NOMINAL IN, seating_surface_shape: FLAT. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-297-0264, 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
1S-473-5-4
NSN: 4820-01-297-0264
FSC: 4820 — Valves, Nonpowered
CAGE: 5XH59 — FLOWSERVE US, INC. DBA AUTOMAX ACTUATORS DIV FLOW CONTROL DIVISION (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
overall_height1.500 INCHES NOMINAL IN
style_designatorPLAIN THREADED
body_inside_diameter27.750 INCHES NOMINAL IN
seating_surface_shapeFLAT
NSN4820-01-297-0264
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1S-473-5-4 · 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
•
STYLE DESIGNATOR: PLAIN THREADED
•
BODY INSIDE DIAMETER: 27.750 INCHES NOMINAL IN
•
MATERIAL: NICKEL ALLOY OVERALL
•
SEATING SURFACE SHAPE: FLAT
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.500 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN THREADED
BODY INSIDE DIAMETER27.750 INCHES NOMINAL IN
MATERIALNICKEL ALLOY OVERALL
SEATING SURFACE SHAPEFLAT
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 3
1S-473-5D-4Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
15-473-5D-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
1S-473-5D PIECE 4Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 1S-473-5-4?
1S-473-5-4 is a SEAT,VALVE.
What parts can replace 1S-473-5-4?
There are 3 known substitutes for 1S-473-5-4: 1S-473-5D-4, 15-473-5D-4, 1S-473-5D PIECE 4. Substitute compatibility should be verified for your specific system.
What is the NSN for 1S-473-5-4?
1S-473-5-4 is cataloged in the U.S. Government catalog under NSN 4820-01-297-0264. 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.