The Expansion Joint,pipe, cataloged under National Stock Number 4730-01-672-9544, 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 Hyspan Precision Products, Inc. Dba Hyspan Precision Products Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Expansion Joint,pipe |
| FSC / FSG | 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings (FSG 47) |
| Manufacturers | Hyspan Precision Products, Inc. Dba Hyspan Precision Products Inc (CAGE 30009) |
| Parameter | Value |
|---|---|
| NSN | 4730-01-672-9544 |
| Primary Part Number | B1039604 |
| Item Name | Expansion Joint,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Hyspan Precision Products, Inc. Dba Hyspan Precision Products Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| B1039604 PRIMARY | Hyspan Precision Products, Inc. Dba Hyspan Precision Products Inc (USA) |
| 28"FSP-0005-25-LS-M5 | Hyspan Precision Products, Inc. Dba Hyspan Precision Products Inc (USA) |
| Reference | Meaning |
|---|---|
| 1039604 | D/9 Drawing number reference only American Boa Inc |
| 28"FSP-0005-25-LS-M5 | 5/9 Secondary reference American Boa Inc |
NSN 4730-01-672-9544 is a Expansion Joint,pipe, manufactured by Hyspan Precision Products, Inc. Dba Hyspan Precision Products Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-672-9544 has 2 manufacturer part numbers on file: B1039604 (Hyspan Precision Products, Inc. Dba Hyspan Precision Products Inc), 28"FSP-0005-25-LS-M5 (Hyspan Precision Products, Inc. Dba Hyspan Precision Products Inc).
1 possible match (shared part number, not a government interchangeability claim): 8040-01-674-3901. Verify interchangeability with system specifications before substitution.
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.