The Adapter,straight,flange to Boss, cataloged under National Stock Number 4730-01-266-1339, 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 The Boeing Company Div Defense. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-266-1339 |
| Primary Part Number | 74A585735-1003 |
| Item Name | Adapter,straight,flange to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Flange Shape | ROUND FIRST END |
| Flange Face Design | PLAIN FIRST END |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END |
| Nominal Overall Length | 0.620 INCHES IN |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Connection Type | FLANGE FIRST END |
| Nominal Thread Size | 1.250 INCHES SECOND END IN |
| Nominal Outside Diameter | 2.600 INCHES FIRST END IN |
| Thread Class | 3A SECOND END A |
| Thread Series Designator | UNJEF SECOND END |
| Nominal Thickness | 0.120 INCHES FIRST END IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 74A585735-1003 | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| 74A585735-1003 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10109012 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 74A585735 | D/9 Drawing number reference only The Boeing Company Div Defense |
NSN 4730-01-266-1339 is a Adapter,straight,flange to Boss, manufactured by The Boeing Company Div Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-266-1339 has 2 manufacturer part numbers on file: 74A585735-1003 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), 74A585735-1003 (The Boeing Company Div Defense).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-267-0440. Verify interchangeability with system specifications before substitution.
Key specifications for 74A585735-1003: Flange Shape: ROUND FIRST END; Flange Face Design: PLAIN FIRST END; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END; Nominal Overall Length: 0.620 INCHES IN. 11 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.