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A51H9211-5 — RESTRICTOR,FLUID FLOW

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

A51H9211-5: RESTRICTOR,FLUID FLOW.

The RESTRICTOR,FLUID FLOW is a the manufacturer industrial component. Key specifications include length: 2.660 INCHES NOMINAL IN, material: ALUMINUM ALLOY, design_type: TUBULAR, HEX SHAPE, thread_class: 3B LOCATION NOT OTHERWISE SPECIFIED, thread_length: 0.656 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 4730-00-006-7891, 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
A51H9211-5
NSN: 4730-00-006-7891
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 61174 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP DIV NORTHROP GRUMMAN AERONAUTICS SYSTEMS (USA)
SPECIFICATIONS
length2.660 INCHES NOMINAL IN
materialALUMINUM ALLOY
design_typeTUBULAR, HEX SHAPE
thread_class3B LOCATION NOT OTHERWISE SPECIFIED
thread_length0.656 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
thread_seriesUNF LOCATION NOT OTHERWISE SPECIFIED
orifice_diameter0.028 INCHES NOMINAL IN
outside_diameter0.937 INCHES NOMINAL IN
thread_provisionTHREADED LOCATION NOT OTHERWISE SPECIFIED
surface_treatmentANODIZE
thread_size_designator7/16-20 LOCATION NOT OTHERWISE SPECIFIED
hose/tube_size_for_which_designed1/4 IN. OD TUBE IN
NSN4730-00-006-7891
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A51H9211-5 · 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: 2.660 INCHES NOMINAL IN
•
THREAD PROVISION: THREADED LOCATION NOT OTHERWISE SPECIFIED
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TYPE 2,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE
•
DESIGN TYPE: TUBULAR, HEX SHAPE
•
THREAD SERIES: UNF LOCATION NOT OTHERWISE SPECIFIED
•
THREAD LENGTH: 0.656 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
HOSE/TUBE SIZE FOR WHICH DESIGNED: 1/4 IN. OD TUBE IN
•
OUTSIDE DIAMETER: 0.937 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
LENGTH2.660 INCHES NOMINAL IN
THREAD PROVISIONTHREADED LOCATION NOT OTHERWISE SPECIFIED
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TYPE 2,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE
DESIGN TYPETUBULAR, HEX SHAPE
THREAD SERIESUNF LOCATION NOT OTHERWISE SPECIFIED
THREAD LENGTH0.656 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
HOSE/TUBE SIZE FOR WHICH DESIGNED1/4 IN. OD TUBE IN
OUTSIDE DIAMETER0.937 INCHES NOMINAL IN
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
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A51H9211-5?
A51H9211-5 is a RESTRICTOR,FLUID FLOW.
What is the NSN for A51H9211-5?
A51H9211-5 is cataloged in the U.S. Government catalog under NSN 4730-00-006-7891. 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.