The Spacer,flexible,pipeline, cataloged under National Stock Number 4730-01-148-2973, 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 10 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-148-2973 |
| Item Name | Spacer,flexible,pipeline |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Inside Width | 3.000 INCHES NOMINAL IN |
| Inside Length | 7.500 INCHES NOMINAL IN |
| Flange Thickness | 0.200 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR |
| Material Document and Classification | MIL-R-6855, CLASS 2, GRADE 40 MIL SPEC SINGLE MATERIAL RESPONSE |
| Body Length | 2.100 INCHES NOMINAL IN |
| Outside Width | 5.100 INCHES NOMINAL IN |
| Material | RUBBER CHLOROPRENE CLASS CR |
| Fabrication Method | MOLDED |
| Thickness | 0.200 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 |
|---|---|
| 845-467606 | D/9 Drawing number reference only U.S. Government activity |
| 2642-643-11 | D/9 Drawing number reference only U.S. Government activity |
| 87643-2501 ITEM F-17 | 3/2 Design control — primary reference U.S. Government activity |
| 501-4675235F17 | 5/2 Secondary reference U.S. Government activity |
| 4675235-0F17 | 5/2 Secondary reference U.S. Government activity |
| 501-4675235 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-148-2973 is a Spacer,flexible,pipeline, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-149-7989, 4730-01-162-7153. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-148-2973: Inside Width: 3.000 INCHES NOMINAL IN; Inside Length: 7.500 INCHES NOMINAL IN; Flange Thickness: 0.200 INCHES NOMINAL IN; Style Designator: RECTANGULAR. 10 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.