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2399-27 — RESTRICTOR,FLUID FLOW

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

2399-27: RESTRICTOR,FLUID FLOW.

The RESTRICTOR,FLUID FLOW is a the manufacturer industrial component. Key specifications include length: 1.156 INCHES NOMINAL IN, material: COPPER ALLOY, design_type: TUBULAR, HEX SHAPE, thread_length: 0.531 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, thread_series: UNS LOCATION NOT OTHERWISE SPECIFIED, orifice_diameter: 0.078 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-863-8440, 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
2399-27
NSN: 4730-00-863-8440
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: K0100 — MEGGITT (UK) LIMITED (GBR)
SPECIFICATIONS
length1.156 INCHES NOMINAL IN
materialCOPPER ALLOY
design_typeTUBULAR, HEX SHAPE
thread_length0.531 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
thread_seriesUNS LOCATION NOT OTHERWISE SPECIFIED
orifice_diameter0.078 INCHES NOMINAL IN
outside_diameter0.437 INCHES NOMINAL IN
thread_directionRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
thread_provisionTHREADED LOCATION NOT OTHERWISE SPECIFIED
thread_size_designator0.250-40 LOCATION NOT OTHERWISE SPECIFIED
hose/tube_size_for_which_designed0.250 IN. ID HOSE IN
NSN4730-00-863-8440
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2399-27 · 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: 1.156 INCHES NOMINAL IN
•
THREAD PROVISION: THREADED LOCATION NOT OTHERWISE SPECIFIED
•
DESIGN TYPE: TUBULAR, HEX SHAPE
•
THREAD SERIES: UNS LOCATION NOT OTHERWISE SPECIFIED
•
THREAD LENGTH: 0.531 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
HOSE/TUBE SIZE FOR WHICH DESIGNED: 0.250 IN. ID HOSE IN
•
OUTSIDE DIAMETER: 0.437 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
TECHNICAL CHARACTERISTICS
LENGTH1.156 INCHES NOMINAL IN
THREAD PROVISIONTHREADED LOCATION NOT OTHERWISE SPECIFIED
DESIGN TYPETUBULAR, HEX SHAPE
THREAD SERIESUNS LOCATION NOT OTHERWISE SPECIFIED
THREAD LENGTH0.531 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
HOSE/TUBE SIZE FOR WHICH DESIGNED0.250 IN. ID HOSE IN
OUTSIDE DIAMETER0.437 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
THREAD SIZE DESIGNATOR0.250-40 LOCATION NOT OTHERWISE SPECIFIED
MATERIALCOPPER ALLOY
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2399-27?
2399-27 is a RESTRICTOR,FLUID FLOW.
What is the NSN for 2399-27?
2399-27 is cataloged in the U.S. Government catalog under NSN 4730-00-863-8440. 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.