The Elbow,flange to Tube, cataloged under National Stock Number 4730-00-020-4499, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-020-4499 |
| Item Name | Elbow,flange to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Flange Shape | TRIANGULAR WITH HOLES SECOND END |
| Flow Angle | 22.0 DEGREES |
| Flange Face Design | PLAIN SECOND END |
| Union Joint Location | FOURTH END |
| Material Document and Classification | AMS5645 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Bolt Hole Nominal Diameter | 0.189 INCHES SECOND END IN |
| Operating Pressure | 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 0.690 INCHES MINIMUM AND 0.710 INCHES MAXIMUM FIRST END IN |
| Leg Length | 0.850 INCHES MINIMUM AND 0.930 INCHES MAXIMUM SECOND END IN |
| Nominal Thread Size | 0.875 INCHES FIRST END IN |
| Seat Angle | 45.0 DEGREES FIRST END |
| Bolt Hole Quantity | 3 SECOND END |
| Thread Class | 3A FIRST END A |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF FIRST END |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Reference | Meaning |
|---|---|
| 37D401690P101 | 3/2 Design control — primary reference U.S. Government activity |
| 37D401690P101 | 5/9 Secondary reference Smiths Tubular Systems-Laconia, Inc. |
| 37D401690P101 | 5/9 Secondary reference Palmer Manufacturing Co., Llc Dba Pursuit Aerospace |
| 94609 | 5/9 Secondary reference Smiths Tubular Systems-Laconia, Inc. |
| 37D401690P101 | 5/9 Secondary reference General Electric Company |
NSN 4730-00-020-4499 is a Elbow,flange to Tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4240-01-481-5531, 5935-01-527-0494. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-00-020-4499: Flange Shape: TRIANGULAR WITH HOLES SECOND END; Flow Angle: 22.0 DEGREES; Flange Face Design: PLAIN SECOND END; Union Joint Location: FOURTH END. 15 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.