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3318637 — FILTER,RADIO FREQUENCY INTERFERE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

3318637: FILTER,RADIO FREQUENCY INTERFERE.

FILTER,RADIO FREQUENCY INTERFERE. Key specifications include shape: ROUND, material: STEEL CORROSION RESISTING, connection_type: THREADED, thread_location: INTERNAL, overall_diameter: 4.000 INCHES NOMINAL IN, system_for_which_designed: OPEN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-439-6325, 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
3318637
NSN: 4820-00-439-6325
FSC: 4820 — Valves, Nonpowered
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
shapeROUND
materialSTEEL CORROSION RESISTING
quantity1
connection_typeTHREADED
thread_locationINTERNAL
overall_diameter4.000 INCHES NOMINAL IN
system_for_which_designedOPEN
thread_size_and_series/type_designator1/8-27 NPT
NSN4820-00-439-6325
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 3318637 · 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
•
OVERALL DIAMETER: 4.000 INCHES NOMINAL IN
•
CONNECTION TYPE: THREADED
•
QUANTITY: 1
•
SHAPE: ROUND
•
THREAD LOCATION: INTERNAL
•
SYSTEM FOR WHICH DESIGNED: OPEN
•
MATERIAL: STEEL CORROSION RESISTING
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 1/8-27 NPT
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER4.000 INCHES NOMINAL IN
CONNECTION TYPETHREADED
QUANTITY1
SHAPEROUND
THREAD LOCATIONINTERNAL
SYSTEM FOR WHICH DESIGNEDOPEN
MATERIALSTEEL CORROSION RESISTING
THREAD SIZE AND SERIES/TYPE DESIGNATOR1/8-27 NPT
SUBSTITUTES & CROSS-REFERENCES 1
MS2174PC10Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3318637?
3318637 is a FILTER,RADIO FREQUENCY INTERFERE.
What parts can replace 3318637?
There is 1 known substitute for 3318637: MS2174PC10. Substitute compatibility should be verified for your specific system.
What is the NSN for 3318637?
3318637 is cataloged in the U.S. Government catalog under NSN 4820-00-439-6325. 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.