The Tailpiece,union, cataloged under National Stock Number 4730-01-252-4910, 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 Naval Sea Systems Command. Government technical data includes 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-252-4910 |
| Primary Part Number | 208-4455755-23A |
| Item Name | Tailpiece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Nominal Pipe Size Designation | 0.500 INCHES IN |
| End Connection Type | WELDED |
| Seat Type | GASKET |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 208-4455755-23A PRIMARY | Naval Sea Systems Command (USA) |
| 208-5530891 ITEM 143 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6552-182 SH23 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
| 208-4455755 | D/9 Drawing number reference only Naval Sea Systems Command |
| FEM SW0.500 N0M | C/1 Advisory reference — outside the item-of-supply concept Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 4730-01-252-4910 is a Tailpiece,union, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-252-4910 has 2 manufacturer part numbers on file: 208-4455755-23A (Naval Sea Systems Command), 208-5530891 ITEM 143 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-256-9099. Verify interchangeability with system specifications before substitution.
Key specifications for 208-4455755-23A: Nominal Pipe Size Designation: 0.500 INCHES IN; End Connection Type: WELDED; Overall Length: 1.438 INCHES NOMINAL IN; Seat Type: GASKET. 4 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.