The Expansion Joint,pipe, cataloged under National Stock Number 4730-01-414-7918, 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 American Boa Inc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-414-7918 |
| Primary Part Number | 18FSP4025-15.75-M15 |
| Item Name | Expansion Joint,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | American Boa Inc |
| Status | ACTIVE |
| Design Type | CORRUGATED ELEMENT |
| Equalization Characteristic | NONEQUALIZING |
| End Connection Type | FLANGED |
| Guide Type | INTERNAL |
| Traverse Maximum Length | 22.750 INCHES IN |
| Bolt Hole Diameter | 1.250 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Bolt Circle Diameter | 0.750 INCHES NOMINAL IN |
| Material | STEEL COMP 316 FLANGE |
| Material | STEEL COMP 316 SLEEVE |
| Joint Type | SINGLE |
| Sleeve Quantity | 1 |
| 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 |
|---|---|
| 18FSP4025-15.75-M15 PRIMARY | American Boa Inc (USA) |
| 1008915 | American Boa Inc (USA) |
| Reference | Meaning |
|---|---|
| 59308 | 5/1 Secondary reference American Boa Inc |
| 70367 | C/1 Advisory reference — outside the item-of-supply concept American Boa Inc |
| 18FSP4025-15.75-M5 | 5/1 Secondary reference American Boa Inc |
| 6736974 FIND NO.F-6 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 4730-01-414-7918 is a Expansion Joint,pipe, manufactured by American Boa Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-414-7918 has 2 manufacturer part numbers on file: 18FSP4025-15.75-M15 (American Boa Inc), 1008915 (American Boa Inc).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-578-7438. Verify interchangeability with system specifications before substitution.
Key specifications for 18FSP4025-15.75-M15: Design Type: CORRUGATED ELEMENT; Equalization Characteristic: NONEQUALIZING; End Connection Type: FLANGED; Guide Type: INTERNAL. 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.