The Elbow,flange to Tube, cataloged under National Stock Number 4730-00-784-2564, 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 21 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-784-2564 |
| Primary Part Number | 404854 |
| 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 | TRIANGULAR WITH HOLES SECOND END |
| Flow Angle | 90.0 DEGREES |
| Flange Face Design | RAISED WITH CURVE AND RADIUS SECOND END |
| Connection Style | FLARED (TUBE) FIRST END |
| Nominal Length | 2.375 INCHES SECOND END IN |
| Bolt Circle Nominal Diameter | 1.875 INCHES SECOND END IN |
| Connection Type | FLANGE SECOND END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Bolt Hole Nominal Diameter | 0.250 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 1.312 INCHES FIRST END IN |
| Leg Length | 2.230 INCHES MINIMUM AND 2.270 INCHES MAXIMUM ALL ENDS IN |
| Nominal Thread Size | 1.500 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES FIRST END |
| Bolt Hole Quantity | 3 SECOND END |
| Nominal Width | 2.188 INCHES SECOND END IN |
| Thread Class | 3A FIRST END A |
| Material | ALUMINUM ALLOY OVERALLUNABLE TO DECODE |
| Thread Series Designator | UNF FIRST END |
| Raised Face Nominal Diameter | 1.188 INCHES SECOND END IN |
| Raised Face Nominal Height | 0.469 INCHES SECOND END IN |
| Nominal Thickness | 0.250 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 |
|---|---|
| 404854 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 404854 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 404854 | 5/9 Secondary reference Royal Oak Gage, Inc |
NSN 4730-00-784-2564 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 4730-00-784-2564 has 1 manufacturer part number on file: 404854 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
1 possible match (shared part number, not a government interchangeability claim): 5995-01-395-8340. Verify interchangeability with system specifications before substitution.
Key specifications for 404854: Flange Shape: TRIANGULAR WITH HOLES SECOND END; Flow Angle: 90.0 DEGREES; Flange Face Design: RAISED WITH CURVE AND RADIUS SECOND END; Connection Style: FLARED (TUBE) FIRST END. 21 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.