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504-4326578 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

504-4326578: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY, thread_class: 3B SINGLE THREADED PORTION, thread_length: 1.062 INCHES NOMINAL SINGLE THREADED PORTION IN, overall_height: 1.188 INCHES NOMINAL IN, overall_length: 20.500 INCHES NOMINAL IN, style_designator: PLAIN THREADED. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-181-0959, 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
504-4326578
NSN: 4820-01-181-0959
NIINs: 011810959, 011832333
FSC: 4820 — Valves, Nonpowered
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY
thread_class3B SINGLE THREADED PORTION
thread_length1.062 INCHES NOMINAL SINGLE THREADED PORTION IN
overall_height1.188 INCHES NOMINAL IN
overall_length20.500 INCHES NOMINAL IN
style_designatorPLAIN THREADED
nominal_thread_size8.250 INCHES SINGLE THREADED PORTION IN
body_inside_diameter7.125 INCHES NOMINAL IN
seating_surface_shapeFLAT
largest_outside_diameter1.750 INCHES NOMINAL IN
thread_quantity_per_inch12 SINGLE THREADED PORTION
thread_series_designatorUNS SINGLE THREADED PORTION
NSN4820-01-181-0959
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 504-4326578 · 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
•
LARGEST OUTSIDE DIAMETER: 1.750 INCHES NOMINAL IN
•
MATERIAL: NICKEL ALLOY
TECHNICAL CHARACTERISTICS
LARGEST OUTSIDE DIAMETER1.750 INCHES NOMINAL IN
OVERALL LENGTH20.500 INCHES NOMINAL IN
MATERIALNICKEL ALLOY
SUBSTITUTES & CROSS-REFERENCES 2
2602-36Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
504-4326578 PIECE 11Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 504-4326578?
504-4326578 is a SEAT,VALVE.
What parts can replace 504-4326578?
There are 2 known substitutes for 504-4326578: 2602-36, 504-4326578 PIECE 11. Substitute compatibility should be verified for your specific system.
What is the NSN for 504-4326578?
504-4326578 is cataloged in the U.S. Government catalog under NSN 4820-01-181-0959. 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.