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LD251-0001-4340 — RESTRICTOR,FLUID FLOW

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

LD251-0001-4340: RESTRICTOR,FLUID FLOW.

The RESTRICTOR,FLUID FLOW is a the manufacturer industrial component. Key specifications include length: 0.032 INCHES NOMINAL IN, material: ALUMINUM ALLOY 2024, design_type: PLATE, orifice_diameter: 0.625 INCHES NOMINAL IN, outside_diameter: 1.343 INCHES NOMINAL IN, thread_provision: UNTHREADED SINGLE PROVISION. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-623-9438, 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
LD251-0001-4340
NSN: 4730-01-623-9438
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 43999 — THE BOEING COMPANY DIV LEGACY AM&M (USA)
SPECIFICATIONS
length0.032 INCHES NOMINAL IN
materialALUMINUM ALLOY 2024
design_typePLATE
orifice_diameter0.625 INCHES NOMINAL IN
outside_diameter1.343 INCHES NOMINAL IN
thread_provisionUNTHREADED SINGLE PROVISION
surface_treatmentANODIZE
end_item_identificationB-1
part_name_assigned_by_controlling_agencyORIFICE, DISC, SHARP-EDGE
NSN4730-01-623-9438
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: LD251-0001-4340 · 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
•
LENGTH: 0.032 INCHES NOMINAL IN
•
THREAD PROVISION: UNTHREADED SINGLE PROVISION
•
DESIGN TYPE: PLATE
•
OUTSIDE DIAMETER: 1.343 INCHES NOMINAL IN
•
SURFACE TREATMENT: ANODIZE
•
MATERIAL: ALUMINUM ALLOY 2024
TECHNICAL CHARACTERISTICS
LENGTH0.032 INCHES NOMINAL IN
THREAD PROVISIONUNTHREADED SINGLE PROVISION
DESIGN TYPEPLATE
OUTSIDE DIAMETER1.343 INCHES NOMINAL IN
SURFACE TREATMENTANODIZE
PART NAME ASSIGNED BY CONTROLLING AGENCYORIFICE, DISC, SHARP-EDGE
END ITEM IDENTIFICATIONB-1
MATERIALALUMINUM ALLOY 2024
ORIFICE DIAMETER0.625 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
LD251-0001Reference 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 LD251-0001-4340?
LD251-0001-4340 is a RESTRICTOR,FLUID FLOW.
What parts can replace LD251-0001-4340?
There is 1 known substitute for LD251-0001-4340: LD251-0001. Substitute compatibility should be verified for your specific system.
What is the NSN for LD251-0001-4340?
LD251-0001-4340 is cataloged in the U.S. Government catalog under NSN 4730-01-623-9438. 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.