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21311 FIND 55 — RESTRICTOR,FLUID FLOW

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

21311 FIND 55: RESTRICTOR,FLUID FLOW.

The RESTRICTOR,FLUID FLOW is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, design_type: TUBULAR, special_features: WEAPONS SYSTEM ESSENTIAL, end_item_identification: VALVE ASSEMBLY 21310-001; SEAWOLF CLASS SSN,SUBMARINE SHIP CONTROL AND NAVIGATION SYSTEMS,SUBMARINE HYDRAULIC, criticality_code_justification: FEAT. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-415-8315, 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
21311 FIND 55
NSN: 4730-01-415-8315
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
design_typeTUBULAR
special_featuresWEAPONS SYSTEM ESSENTIAL
end_item_identificationVALVE ASSEMBLY 21310-001; SEAWOLF CLASS SSN,SUBMARINE SHIP CONTROL AND NAVIGATION SYSTEMS,SUBMARINE HYDRAULIC
criticality_code_justificationFEAT
NSN4730-01-415-8315
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 21311 FIND 55 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
DESIGN TYPE: TUBULAR
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
MATERIAL: STEEL CORROSION RESISTING
TECHNICAL CHARACTERISTICS
DESIGN TYPETUBULAR
CRITICALITY CODE JUSTIFICATIONFEAT
SPECIAL FEATURESWEAPONS SYSTEM ESSENTIAL
END ITEM IDENTIFICATIONVALVE ASSEMBLY 21310-001; SEAWOLF CLASS SSN,SUBMARINE SHIP CONTROL AND NAVIGATION SYSTEMS,SUBMARINE HYDRAULIC
MATERIALSTEEL CORROSION RESISTING
SUBSTITUTES & CROSS-REFERENCES 1
21310Reference 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 21311 FIND 55?
21311 FIND 55 is a RESTRICTOR,FLUID FLOW.
What parts can replace 21311 FIND 55?
There is 1 known substitute for 21311 FIND 55: 21310. Substitute compatibility should be verified for your specific system.
What is the NSN for 21311 FIND 55?
21311 FIND 55 is cataloged in the U.S. Government catalog under NSN 4730-01-415-8315. 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.