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N-3120-17 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

N-3120-17: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, overall_height: 0.500 INCHES NOMINAL IN, style_designator: PLAIN, body_inside_diameter: 2.375 INCHES NOMINAL IN, body_outside_diameter: 3.375 INCHES NOMINAL IN, seating_surface_shape: FLAT. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-046-2180, 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
N-3120-17
NSN: 4820-01-046-2180
FSC: 4820 — Valves, Nonpowered
CAGE: 21013 — METREX VALVE CORP. DBA METREX VALVE CORP (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
overall_height0.500 INCHES NOMINAL IN
style_designatorPLAIN
body_inside_diameter2.375 INCHES NOMINAL IN
body_outside_diameter3.375 INCHES NOMINAL IN
seating_surface_shapeFLAT
end_item_identificationMODEL NHPB-31120,SIZE 3 IN. IN
NSN4820-01-046-2180
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: N-3120-17 · 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
•
BODY OUTSIDE DIAMETER: 3.375 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN
•
BODY INSIDE DIAMETER: 2.375 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC OVERALL
•
SEATING SURFACE SHAPE: FLAT
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.500 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER3.375 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN
BODY INSIDE DIAMETER2.375 INCHES NOMINAL IN
END ITEM IDENTIFICATIONMODEL NHPB-31120,SIZE 3 IN. IN
MATERIALRUBBER SYNTHETIC OVERALL
SEATING SURFACE SHAPEFLAT
SUBSTITUTES & CROSS-REFERENCES 2
NHPB31120PIECE44Reference document
Same NSN cross-reference
Reference document — Secondary reference
NHPB31120Reference 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 N-3120-17?
N-3120-17 is a SEAT,VALVE.
What parts can replace N-3120-17?
There are 2 known substitutes for N-3120-17: NHPB31120PIECE44, NHPB31120. Substitute compatibility should be verified for your specific system.
What is the NSN for N-3120-17?
N-3120-17 is cataloged in the U.S. Government catalog under NSN 4820-01-046-2180. 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.