The Elbow,flange, cataloged under National Stock Number 4730-01-199-8737, 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 17 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-199-8737 |
| Item Name | Elbow,flange |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES FIRST END |
| Flange Shape | ROUND WITH HOLES SECOND END |
| Flow Angle | 90.0 DEGREES |
| Flange Face Design | RAISED STRAIGHT FIRST END |
| Bolt Circle Nominal Diameter | 10.062 INCHES SECOND END IN |
| Bolt Circle Nominal Diameter | 13.250 INCHES FIRST END IN |
| Connection Type | FLANGE SECOND END |
| Bolt Hole Nominal Diameter | 1.312 INCHES FIRST END IN |
| Bolt Hole Nominal Diameter | 1.062 INCHES SECOND END IN |
| Leg Length | 12.750 INCHES NOMINAL SECOND END IN |
| Leg Length | 8.438 INCHES NOMINAL FIRST END IN |
| Bolt Hole Quantity | 11 FIRST END |
| Bolt Hole Quantity | 11 SECOND END |
| Material | NICKEL ALLOY OVERALL |
| Raised Face Nominal Height | 0.562 INCHES FIRST END IN |
| Nominal Thickness | 2.250 INCHES FIRST END IN |
| Nominal Thickness | 1.750 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 |
| Reference | Meaning |
|---|---|
| 845-1889800 | D/9 Drawing number reference only U.S. Government activity |
| 845-1889800 PIECE 4 | 5/2 Secondary reference U.S. Government activity |
| 2640-051PIECE4 | 3/2 Design control — primary reference U.S. Government activity |
| 2640-051 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-199-8737 is a Elbow,flange, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-211-5352. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-199-8737: Flange Shape: ROUND WITH HOLES FIRST END; Flange Shape: ROUND WITH HOLES SECOND END; Flow Angle: 90.0 DEGREES; Flange Face Design: RAISED STRAIGHT FIRST END. 17 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.