The Spacer,flexible,pipeline, cataloged under National Stock Number 4730-01-157-9666, 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 9 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-157-9666 |
| Item Name | Spacer,flexible,pipeline |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Flange Thickness | 0.190 INCHES NOMINAL IN |
| Style Designator | ROUND |
| Outside Diameter | 6.550 INCHES NOMINAL IN |
| Body Length | 2.120 INCHES NOMINAL IN |
| Inside Diameter | 4.500 INCHES NOMINAL IN |
| Flange Height | 2.050 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC |
| Fabrication Method | EXTRUDED |
| Thickness | 0.190 INCHES NOMINAL 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 |
|---|---|
| 2642-643-11 | D/9 Drawing number reference only U.S. Government activity |
| 87643-2530 | D/9 Drawing number reference only U.S. Government activity |
| 4675265-0F49 | 5/2 Secondary reference U.S. Government activity |
| 87643-2530 ITEM F49 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-157-9666 is a Spacer,flexible,pipeline, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-01-199-5881. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-157-9666: Flange Thickness: 0.190 INCHES NOMINAL IN; Style Designator: ROUND; Outside Diameter: 6.550 INCHES NOMINAL IN; Body Length: 2.120 INCHES NOMINAL IN. 9 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.