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3321987 — STOP,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

3321987: STOP,VALVE.

The STOP,VALVE is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: STEEL,CORROSION RESISTING AMS 5643. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-154-9733, 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
3321987
NSN: 4820-01-154-9733
FSC: 4820 — Valves, Nonpowered
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
general_characteristics_item_descriptionSTEEL,CORROSION RESISTING AMS 5643
NSN4820-01-154-9733
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 3321987 · 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
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GENERAL CHARACTERISTICS ITEM DESCRIPTION: STEEL,CORROSION RESISTING AMS 5643
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSTEEL,CORROSION RESISTING AMS 5643
SUBSTITUTES & CROSS-REFERENCES 2
3311997Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
3311997 ITEM 144Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 3321987?
3321987 is a STOP,VALVE.
What parts can replace 3321987?
There are 2 known substitutes for 3321987: 3311997, 3311997 ITEM 144. Substitute compatibility should be verified for your specific system.
What is the NSN for 3321987?
3321987 is cataloged in the U.S. Government catalog under NSN 4820-01-154-9733. 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.