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NSN 4730-01-299-9491Government record, cited
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Reducer, Pipe4730-01-299-9491

NSN 4730-01-299-9491 · NIIN 012999491 · Part number 1551AS717-074
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier · FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings · FSG 47 — Pipe, Tubing, Hose, and Fittings · CAGE 30003
Government record, cited
NSN 4730-01-299-9491 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-299-9491. Manufacturer of record part number: 1551AS717-074.
Also searched as  4730-01-299-9491 · 4730012999491 · NIIN 012999491 · 01-299-9491 · FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · CAGE 30003 · 1551AS717-074 · 1551AS717 1/2X3/4 · 1551AS717
Nearby stock numbers  ·
L 0.850 INCHES IN NPT FIRST END HOSE FITTING
4730-01-299-9491 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
  • Reducer,pipe — FSC 4730
  • Connection Style: PLAIN (PIPE) FIRST END
  • Connection Style: PLAIN (PIPE) SECOND END
  • Nominal Overall Length: 0.850 INCHES IN
  • Connection Type: THREADED INTERNAL PIPE FIRST END
  • Connection Type: THREADED EXTERNAL PIPE SECOND END
  • Nominal Thread Size: 0.750 INCHES SECOND END IN
  • Nominal Thread Size: 0.500 INCHES FIRST END IN
Identification
  • NSN: 4730-01-299-9491
  • NIIN: 012999491
  • FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
  • FSG: 47 — Pipe, Tubing, Hose, and Fittings
  • Primary part number: 1551AS717-074
  • Manufacturer: Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
General Description

The Reducer,pipe, cataloged under National Stock Number 4730-01-299-9491, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-299-9491
Primary Part Number1551AS717-074
Item NameReducer,pipe
FSC / FSG4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
ManufacturerNaval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
StatusACTIVE
Connection StylePLAIN (PIPE) FIRST END
Connection StylePLAIN (PIPE) SECOND END
Nominal Overall Length0.850 INCHES IN
Connection TypeTHREADED INTERNAL PIPE FIRST END
Connection TypeTHREADED EXTERNAL PIPE SECOND END
Nominal Thread Size0.750 INCHES SECOND END IN
Nominal Thread Size0.500 INCHES FIRST END IN
Surface TreatmentCADMIUM OVERALL
MaterialIRON OVERALL
Thread Series DesignatorNPT SECOND END
Thread Series DesignatorNPT FIRST END
Reducer TypeCONCENTRIC
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4730-01-299-94921551AS717-092 POSSIBLE MATCH
REDUCER,PIPE
Possible match (shared part number)Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
4730-01-299-94931551AS717-104 POSSIBLE MATCH
REDUCER,PIPE
Possible match (shared part number)Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
4730-01-300-31751551AS717-273 POSSIBLE MATCH
BUSHING,PIPE
Possible match (shared part number)Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
4730-01-300-41251551AS717-023 POSSIBLE MATCH
REDUCER,PIPE
Possible match (shared part number)Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
4730-01-300-41261551AS717-054 POSSIBLE MATCH
REDUCER,PIPE
Possible match (shared part number)Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
4730-01-372-66811551AS717-094 POSSIBLE MATCH
BUSHING,PIPE
Possible match (shared part number)Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
Cross-Reference Index
Part NumberManufacturer
1551AS717-074 PRIMARY Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA)
Reference documents
ReferenceMeaning
1551AS717 1/2X3/4 5/1 Secondary reference
Flagg Stanley G & Co Inc Dba Flagg Brass
1551AS717 D/9 Drawing number reference only
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
Related Parts
4730-01-299-9492POSSIBLE MATCH
REDUCER,PIPE
1551AS717-092
4730-01-299-9493POSSIBLE MATCH
REDUCER,PIPE
1551AS717-104
4730-01-300-3175POSSIBLE MATCH
BUSHING,PIPE
1551AS717-273
4730-01-300-4125POSSIBLE MATCH
REDUCER,PIPE
1551AS717-023
4730-01-300-4126POSSIBLE MATCH
REDUCER,PIPE
1551AS717-054
4730-01-372-6681POSSIBLE MATCH
BUSHING,PIPE
1551AS717-094

Frequently Asked Questions

What is NSN 4730-01-299-9491?

NSN 4730-01-299-9491 is a Reducer,pipe, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.

What part numbers are listed for NSN 4730-01-299-9491?

NSN 4730-01-299-9491 has 1 manufacturer part number on file: 1551AS717-074 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).

What NSN replaces 4730-01-299-9491?

6 possible matches (shared part number, not a government interchangeability claim): 4730-01-299-9492, 4730-01-299-9493, 4730-01-300-3175. Verify interchangeability with system specifications before substitution.

What are the specifications of 1551AS717-074?

Key specifications for 1551AS717-074: Connection Style: PLAIN (PIPE) FIRST END; Connection Style: PLAIN (PIPE) SECOND END; Nominal Overall Length: 0.850 INCHES IN; Connection Type: THREADED INTERNAL PIPE FIRST END. 12 specifications are documented in the U.S. Government catalog.

Is NSN 4730-01-299-9491 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

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✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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