The Elbow,flange to Tube, cataloged under National Stock Number 4730-00-545-4955, 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 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 25 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-545-4955 |
| Primary Part Number | 231905 |
| Item Name | Elbow,flange to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Flange Shape | RECTANGULAR WITH HOLES SECOND END |
| Flow Angle | 90.0 DEGREES |
| Flange Face Design | RAISED STRAIGHT SECOND END |
| Connection Style | INVERTED FLARE (TUBE) FIRST END |
| Nominal Length | 2.606 INCHES SECOND END IN |
| Connection Type | FLANGE SECOND END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Material Document and Classification | AMS 4135 ASSN STD SINGLE MATERIAL RESPONSE OVERALLUNABLE TO DECODE |
| Bolt Hole Nominal Diameter | 0.349 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 1.312 INCHES FIRST ENDUNABLE TO DECODE IN |
| Leg Length | 2.280 INCHES NOMINAL FIRST END IN |
| Leg Length | 1.490 INCHES NOMINAL SECOND END IN |
| Nominal Thread Size | 1.500 INCHES FIRST END IN |
| Seat Angle | 25.0 DEGREES FIRST END |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 1.906 INCHES SECOND END IN |
| Bolt Hole Quantity | 4 SECOND END |
| Nominal Width | 2.606 INCHES SECOND END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 1.906 INCHES SECOND END IN |
| Thread Class | 2A FIRST END A |
| Thread Quantity Per Inch | 16 FIRST END |
| Material | ALUMINUM ALLOY 2014 OVERALLUNABLE TO DECODE |
| Thread Series Designator | UN FIRST END |
| Raised Face Nominal Diameter | 1.310 INCHES SECOND ENDUNABLE TO DECODE IN |
| Raised Face Nominal Height | 0.230 INCHES SECOND ENDUNABLE TO DECODE IN |
| Nominal Thickness | 0.270 INCHES SECOND 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 |
|---|---|
| 231905 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 231905 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 4730-00-545-4955 is a Elbow,flange to Tube, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-545-4955 has 1 manufacturer part number on file: 231905 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
2 possible matches (shared part number, not a government interchangeability claim): 3020-01-007-2281, 5985-01-175-1686. Verify interchangeability with system specifications before substitution.
Key specifications for 231905: Flange Shape: RECTANGULAR WITH HOLES SECOND END; Flow Angle: 90.0 DEGREES; Flange Face Design: RAISED STRAIGHT SECOND END; Connection Style: INVERTED FLARE (TUBE) FIRST END. 25 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.