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253009 PIECE 4 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

253009 PIECE 4: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, flange_diameter: 6.875 INCHES NOMINAL IN, under_flange_height: 1.312 INCHES NOMINAL IN, flange_seat_to_disk_end_height: 1.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-151-8960, 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
253009 PIECE 4
NSN: 4820-01-151-8960
FSC: 4820 — Valves, Nonpowered
CAGE: 43689 — HUNTINGTON INGALLS INC DIV NEWPORT NEWS SHIPBUILDING (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
flange_diameter6.875 INCHES NOMINAL IN
under_flange_height1.312 INCHES NOMINAL IN
flange_seat_to_disk_end_height1.000 INCHES NOMINAL IN
NSN4820-01-151-8960
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 253009 PIECE 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
•
FLANGE SEAT TO DISK END HEIGHT: 1.000 INCHES NOMINAL IN
•
FLANGE DIAMETER: 6.875 INCHES NOMINAL IN
•
UNDER FLANGE HEIGHT: 1.312 INCHES NOMINAL IN
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT1.000 INCHES NOMINAL IN
FLANGE DIAMETER6.875 INCHES NOMINAL IN
UNDER FLANGE HEIGHT1.312 INCHES NOMINAL IN
MATERIALSTEEL CORROSION RESISTING OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
253009Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 253009 PIECE 4?
253009 PIECE 4 is a SEAT,VALVE.
What parts can replace 253009 PIECE 4?
There is 1 known substitute for 253009 PIECE 4: 253009. Substitute compatibility should be verified for your specific system.
What is the NSN for 253009 PIECE 4?
253009 PIECE 4 is cataloged in the U.S. Government catalog under NSN 4820-01-151-8960. 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.