The Adapter,straight,flange to Tube, cataloged under National Stock Number 4730-01-628-4257, 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 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-628-4257 |
| Item Name | Adapter,straight,flange to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Flange Shape | OVAL WITH HOLES FIRST END |
| Surface Treatment Document and Classification | MIL-A-8625,TYPEIII,CLASS 02 ASSN STD ALL TREATMENT RESPONSES BODY |
| Flange Thickness | 5.5 INCHES NOMINAL ALL ENDS IN |
| Connection Type | FLANGE AND UNTHREADED TUBE W/FORMED END FIRST END |
| Material Document and Classification | 6061-T651,IAW B209 OR AMS 4027, ASSN STD ALL MATERIAL RESPONSES BODY |
| Bolt Hole Nominal Diameter | 0.290 INCHES FIRST END IN |
| Bolt Hole Quantity | 2 FIRST END |
| Surface Treatment | ANODIZE BODY |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 2.5 INCHES FIRST END IN |
| Nominal Coupling Size Accommodated | 1.754 INCHES SECOND END IN |
| Material | ALUMINUM ALLOY 6061 BODY |
| Nominal Thickness | 0.062 INCHES ALL ENDS 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 |
|---|---|
| A3308495 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-628-4257 is a Adapter,straight,flange to Tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-628-4257: Flange Shape: OVAL WITH HOLES FIRST END; Surface Treatment Document and Classification: MIL-A-8625,TYPEIII,CLASS 02 ASSN STD ALL TREATMENT RESPONSES BODY; Flange Thickness: 5.5 INCHES NOMINAL ALL ENDS IN; Connection Type: FLANGE AND UNTHREADED TUBE W/FORMED END FIRST END. 12 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.