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AA2051-1D4 — RESTRICTOR,FLUID FLOW

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AA2051-1D4: RESTRICTOR,FLUID FLOW.

The RESTRICTOR,FLUID FLOW is a the manufacturer industrial component. Key specifications include length: 1.313 INCHES NOMINAL IN, material: ALUMINUM ALLOY, design_type: TUBULAR, thread_class: 3B LOCATION NOT OTHERWISE SPECIFIED, thread_length: 0.500 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, thread_series: UNF LOCATION NOT OTHERWISE SPECIFIED. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-604-5073, 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
AA2051-1D4
NSN: 4730-00-604-5073
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 18350 — PALL AEROPOWER CORPORATION (USA)
SPECIFICATIONS
length1.313 INCHES NOMINAL IN
materialALUMINUM ALLOY
design_typeTUBULAR
thread_class3B LOCATION NOT OTHERWISE SPECIFIED
thread_length0.500 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
thread_seriesUNF LOCATION NOT OTHERWISE SPECIFIED
orifice_diameter0.028 INCHES NOMINAL IN
outside_diameter0.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
thread_provisionTHREADED LOCATION NOT OTHERWISE SPECIFIED
surface_treatmentANODIZE
thread_size_designator7/16-20 LOCATION NOT OTHERWISE SPECIFIED
NSN4730-00-604-5073
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AA2051-1D4 · 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: 1.313 INCHES NOMINAL IN
•
THREAD PROVISION: THREADED LOCATION NOT OTHERWISE SPECIFIED
•
DESIGN TYPE: TUBULAR
•
THREAD SERIES: UNF LOCATION NOT OTHERWISE SPECIFIED
•
THREAD LENGTH: 0.500 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
HOSE/TUBE SIZE FOR WHICH DESIGNED: 1/4 IN. OD TUBE IN
•
OUTSIDE DIAMETER: 0.750 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
TECHNICAL CHARACTERISTICS
LENGTH1.313 INCHES NOMINAL IN
THREAD PROVISIONTHREADED LOCATION NOT OTHERWISE SPECIFIED
DESIGN TYPETUBULAR
THREAD SERIESUNF LOCATION NOT OTHERWISE SPECIFIED
THREAD LENGTH0.500 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
HOSE/TUBE SIZE FOR WHICH DESIGNED1/4 IN. OD TUBE IN
OUTSIDE DIAMETER0.750 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
THREAD SIZE DESIGNATOR7/16-20 LOCATION NOT OTHERWISE SPECIFIED
SURFACE TREATMENTANODIZE
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AA2051-1D4?
AA2051-1D4 is a RESTRICTOR,FLUID FLOW.
What is the NSN for AA2051-1D4?
AA2051-1D4 is cataloged in the U.S. Government catalog under NSN 4730-00-604-5073. 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.