The Spacer,flexible,pipeline, cataloged under National Stock Number 4730-01-148-6986, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Kadant Unaflex Llc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-148-6986 |
| Primary Part Number | 501-4645499 ITEM 29 |
| Item Name | Spacer,flexible,pipeline |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Kadant Unaflex Llc |
| Status | ACTIVE |
| Flange Thickness | 0.190 INCHES NOMINAL IN |
| Style Designator | ROUND |
| Material Document and Classification | MIL-R-6855, CLASS 2, GRADE 40 MIL SPEC SINGLE MATERIAL RESPONSE |
| Outside Diameter | 27.350 INCHES NOMINAL IN |
| Body Length | 2.120 INCHES NOMINAL IN |
| Inside Diameter | 23.100 INCHES NOMINAL IN |
| Flange Height | 2.125 INCHES NOMINAL IN |
| Material | RUBBER CHLOROPRENE CLASS CR |
| Fabrication Method | MOLDED |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 501-4645499 ITEM 29 PRIMARY | Kadant Unaflex Llc (USA) |
| Reference | Meaning |
|---|---|
| 4645499-0F29 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 501-4645499 | D/9 Drawing number reference only U.S. Government activity |
| 87642-1201IT F29 | 3/2 Design control — primary reference U.S. Government activity |
| 4645499 0F29 | 5/2 Secondary reference U.S. Government activity |
| 845-4675606 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-148-6986 is a Spacer,flexible,pipeline, manufactured by Kadant Unaflex Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-148-6986 has 1 manufacturer part number on file: 501-4645499 ITEM 29 (Kadant Unaflex Llc).
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-149-3486, 4730-01-163-0941. Verify interchangeability with system specifications before substitution.
Key specifications for 501-4645499 ITEM 29: Flange Thickness: 0.190 INCHES NOMINAL IN; Style Designator: ROUND; Material Document and Classification: MIL-R-6855, CLASS 2, GRADE 40 MIL SPEC SINGLE MATERIAL RESPONSE; Outside Diameter: 27.350 INCHES NOMINAL IN. 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.