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2280-402 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

2280-402: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, thread_class: 3A SINGLE THREADED PORTION A, thread_length: 0.875 INCHES NOMINAL SINGLE THREADED PORTION IN, overall_height: 0.875 INCHES NOMINAL IN, style_designator: PLAIN THREADED, seat_angle_in_deg: 45.000 NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-188-3595, 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
2280-402
NSN: 4820-01-188-3595
NIINs: 011883595, 011883892
FSC: 4820 — Valves, Nonpowered
CAGE: 43689 — HUNTINGTON INGALLS INC DIV NEWPORT NEWS SHIPBUILDING (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class3A SINGLE THREADED PORTION A
thread_length0.875 INCHES NOMINAL SINGLE THREADED PORTION IN
overall_height0.875 INCHES NOMINAL IN
style_designatorPLAIN THREADED
seat_angle_in_deg45.000 NOMINAL
nominal_thread_size6.000 INCHES SINGLE THREADED PORTION IN
body_inside_diameter5.000 INCHES NOMINAL IN
seating_surface_shapeANGULAR
thread_quantity_per_inch12 SINGLE THREADED PORTION
thread_series_designatorUN SINGLE THREADED PORTION
NSN4820-01-188-3595
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 2280-402 · 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
•
THREAD LENGTH: 0.875 INCHES NOMINAL SINGLE THREADED PORTION IN
•
STYLE DESIGNATOR: PLAIN THREADED
•
BODY INSIDE DIAMETER: 5.000 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 6.000 INCHES SINGLE THREADED PORTION IN
•
THREAD CLASS: 3A SINGLE THREADED PORTION A
•
THREAD QUANTITY PER INCH: 12 SINGLE THREADED PORTION
•
MATERIAL: NICKEL ALLOY OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.875 INCHES NOMINAL IN
THREAD LENGTH0.875 INCHES NOMINAL SINGLE THREADED PORTION IN
STYLE DESIGNATORPLAIN THREADED
BODY INSIDE DIAMETER5.000 INCHES NOMINAL IN
NOMINAL THREAD SIZE6.000 INCHES SINGLE THREADED PORTION IN
THREAD CLASS3A SINGLE THREADED PORTION A
THREAD QUANTITY PER INCH12 SINGLE THREADED PORTION
MATERIALNICKEL ALLOY OVERALL
SEAT ANGLE IN DEG45.000 NOMINAL
THREAD SERIES DESIGNATORUN SINGLE THREADED PORTION
SUBSTITUTES & CROSS-REFERENCES 3
508-4325934Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
2280-402 PC 13Reference document
Same NSN cross-reference
Reference document — Secondary reference
508-4325934 PC 13Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2280-402?
2280-402 is a SEAT,VALVE.
What parts can replace 2280-402?
There are 3 known substitutes for 2280-402: 508-4325934, 2280-402 PC 13, 508-4325934 PC 13. Substitute compatibility should be verified for your specific system.
What is the NSN for 2280-402?
2280-402 is cataloged in the U.S. Government catalog under NSN 4820-01-188-3595. 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.