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21357-4 — SLEEVE AND SLIDE,DIRECTIONAL CON

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

21357-4: SLEEVE AND SLIDE,DIRECTIONAL CON.

SLEEVE AND SLIDE,DIRECTIONAL CON. Key specifications include slide_material: STEEL, sleeve_material: STEEL, special_features: NITRIDING STEEL, MIL-S-6709, end_item_identification: SEAWOLF CLASS SSN, valve_design_control_activity: 78062. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-414-4396, 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
21357-4
NSN: 4820-01-414-4396
FSC: 4820 — Valves, Nonpowered
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
slide_materialSTEEL
sleeve_materialSTEEL
special_featuresNITRIDING STEEL, MIL-S-6709
end_item_identificationSEAWOLF CLASS SSN
valve_design_control_activity78062
NSN4820-01-414-4396
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 21357-4 · 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
•
SLIDE MATERIAL: STEEL
•
SLEEVE MATERIAL: STEEL
•
VALVE DESIGN CONTROL ACTIVITY: 78062
TECHNICAL CHARACTERISTICS
SLIDE MATERIALSTEEL
SPECIAL FEATURESNITRIDING STEEL, MIL-S-6709
SLEEVE MATERIALSTEEL
VALVE DESIGN CONTROL ACTIVITY78062
END ITEM IDENTIFICATIONSEAWOLF CLASS SSN
SUBSTITUTES & CROSS-REFERENCES 1
21357Reference 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 21357-4?
21357-4 is a SLEEVE AND SLIDE,DIRECTIONAL CON.
What parts can replace 21357-4?
There is 1 known substitute for 21357-4: 21357. Substitute compatibility should be verified for your specific system.
What is the NSN for 21357-4?
21357-4 is cataloged in the U.S. Government catalog under NSN 4820-01-414-4396. 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.