The Elbow,flange, cataloged under National Stock Number 4730-01-129-1702, 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 23 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-129-1702 |
| Item Name | Elbow,flange |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES SECOND ENDROUND WITH HOLES SECOND END |
| Flange Shape | RECTANGULAR WITH HOLES FIRST ENDRECTANGULAR WITH HOLES FIRST END |
| Flow Angle | 90.0 DEGREES90.0 DEGREES |
| Flange Face Design | PLAIN FIRST END |
| Flange Face Design | PLAIN SECOND END |
| Nominal Length | 21.000 INCHES FIRST END21.000 INCHES FIRST END IN |
| Bolt Circle Nominal Diameter | 14.060 INCHES SECOND END14.060 INCHES SECOND END IN |
| Connection Type | FLANGE SECOND ENDFLANGE SECOND END |
| Connection Type | FLANGE FIRST ENDFLANGE FIRST END |
| Material Document and Classification | MIL-C-20159,TY 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Bolt Hole Nominal Diameter | 0.562 INCHES FIRST END0.562 INCHES FIRST END IN |
| Bolt Hole Nominal Diameter | 0.812 INCHES SECOND END0.812 INCHES SECOND END IN |
| Leg Length | 16.000 INCHES NOMINAL SECOND END16.000 INCHES NOMINAL SECOND END IN |
| Leg Length | 16.380 INCHES NOMINAL FIRST END16.380 INCHES NOMINAL FIRST END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 2.400 INCHES FIRST END2.400 INCHES FIRST END IN |
| Nominal Outside Diameter | 17.620 INCHES SECOND END17.620 INCHES SECOND END IN |
| Bolt Hole Quantity | 18 SECOND END18 SECOND END |
| Bolt Hole Quantity | 22 FIRST END22 FIRST END |
| Nominal Width | 9.750 INCHES FIRST END9.750 INCHES FIRST END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 2.390 INCHES FIRST END2.390 INCHES FIRST END IN |
| Material | COPPER ALLOY OVERALL |
| Nominal Thickness | 1.250 INCHES FIRST END1.250 INCHES FIRST END IN |
| Nominal Thickness | 1.500 INCHES SECOND END1.500 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 |
|---|---|
| 704-4674166 ITEM 9 | 5/2 Secondary reference U.S. Government activity |
| 704-4674166 | D/9 Drawing number reference only U.S. Government activity |
| 704-4674166 ITEM 9 | 3/2 Design control — primary reference U.S. Government activity |
| 87553-5008 IT 9 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-129-1702 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): 4730-01-129-1753. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-129-1702: Flange Shape: ROUND WITH HOLES SECOND ENDROUND WITH HOLES SECOND END; Flange Shape: RECTANGULAR WITH HOLES FIRST ENDRECTANGULAR WITH HOLES FIRST END; Flow Angle: 90.0 DEGREES90.0 DEGREES; Flange Face Design: PLAIN FIRST END. 23 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.