PartsTable TECHNICAL DATA SHEET
NSN 4730-01-473-6667Government record, cited

Reducer, Boss4730-01-473-6667

NSN 4730-01-473-6667 · NIIN 014736667 · Part number 821367-1
Hamilton Sundstrand Corporation Dba Collins Aerospace · FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings · FSG 47 — Pipe, Tubing, Hose, and Fittings · CAGE 73030
Government record, cited
NSN 4730-01-473-6667 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-473-6667. Manufacturer of record part number: 821367-1.
Also searched as  4730-01-473-6667 · 4730014736667 · NIIN 014736667 · 01-473-6667 · FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · CAGE 73030 · 821367-1
Nearby stock numbers  ·
Features
  • Reducer,boss — FSC 4730
  • Connection Style: FLARED W/ GASKET SEAL (BOSS) ALL ENDS
  • Nominal Overall Length: 1.406 INCHES IN
  • Connection Type: THREADED EXTERNAL BOSS ALL ENDS
  • Nominal Thread Size: 0.438 INCHES SECOND END IN
  • Nominal Thread Size: 0.562 INCHES FIRST END IN
  • Thread Class: 3A ALL ENDS A
  • Material: STEEL COMP 347 OVERALL
Identification
  • NSN: 4730-01-473-6667
  • NIIN: 014736667
  • FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
  • FSG: 47 — Pipe, Tubing, Hose, and Fittings
  • Primary part number: 821367-1
  • Manufacturer: Hamilton Sundstrand Corporation Dba Collins Aerospace
General Description

The Reducer,boss, cataloged under National Stock Number 4730-01-473-6667, 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 Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 10 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. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-473-6667
Primary Part Number821367-1
Item NameReducer,boss
FSC / FSG4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
ManufacturerHamilton Sundstrand Corporation Dba Collins Aerospace
StatusACTIVE
Connection StyleFLARED W/ GASKET SEAL (BOSS) ALL ENDS
Nominal Overall Length1.406 INCHES IN
Connection TypeTHREADED EXTERNAL BOSS ALL ENDS
Nominal Thread Size0.438 INCHES SECOND END IN
Nominal Thread Size0.562 INCHES FIRST END IN
Thread Class3A ALL ENDS A
MaterialSTEEL COMP 347 OVERALL
Thread Series DesignatorUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
Thread Series DesignatorUNF SECOND END
Reducer TypeCONCENTRIC
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeF
Cross-Reference Index
Part NumberManufacturer
821367-1 PRIMARY Hamilton Sundstrand Corporation Dba Collins Aerospace (USA)
No interchangeability data on file.
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
4730-00-000-1895 · Item name not on file
4730-00-000-4289
4730-00-000-4289 · Item name not on file
4730-00-000-4445
4730-00-000-4445 · Item name not on file
4730-00-000-8373
4730-00-000-8373 · Item name not on file
4730-00-000-8897
4730-00-000-8897 · Item name not on file
4730-00-001-0007
4730-00-001-0007 · Item name not on file
4730-00-001-0008
COUPLING,TUBE
4730-00-001-0008
COUPLING,TUBE

Frequently Asked Questions

What is NSN 4730-01-473-6667?

NSN 4730-01-473-6667 is a Reducer,boss, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.

What part numbers are listed for NSN 4730-01-473-6667?

NSN 4730-01-473-6667 has 1 manufacturer part number on file: 821367-1 (Hamilton Sundstrand Corporation Dba Collins Aerospace).

What are the specifications of 821367-1?

Key specifications for 821367-1: Connection Style: FLARED W/ GASKET SEAL (BOSS) ALL ENDS; Nominal Overall Length: 1.406 INCHES IN; Connection Type: THREADED EXTERNAL BOSS ALL ENDS; Nominal Thread Size: 0.438 INCHES SECOND END IN. 10 specifications are documented in the U.S. Government catalog.

Is NSN 4730-01-473-6667 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.

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