The Tailpiece,union, cataloged under National Stock Number 4730-01-270-9812, 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 7 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-270-9812 |
| Primary Part Number | 810-2145528-2 |
| Item Name | Tailpiece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Union Outside Diameter | 0.390 INCHES NOMINAL IN |
| Flange Thickness | 0.140 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN |
| End Connection Type | BRAZED |
| Seat Type | GASKET |
| Tubing Outside Diameter | 0.250 INCHES NOMINAL IN |
| Material | COPPER ALLOY 706 |
| Flange Outside Diameter | 0.497 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 |
|---|---|
| 810-2145528-2 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 810-2145528 | D/9 Drawing number reference only Naval Sea Systems Command |
| 810-2145528-2 | 5/9 Secondary reference U.S. Government activity |
| 810-2145528-2 | 5/9 Secondary reference Photographic Engineering |
| 810-2145528-2 | 5/9 Secondary reference Weksler Glass Thermometer Corp |
NSN 4730-01-270-9812 is a Tailpiece,union, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-270-9812 has 1 manufacturer part number on file: 810-2145528-2 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-314-8807. Verify interchangeability with system specifications before substitution.
Key specifications for 810-2145528-2: Union Outside Diameter: 0.390 INCHES NOMINAL IN; Flange Thickness: 0.140 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN; End Connection Type: BRAZED; Overall Length: 0.438 INCHES NOMINAL IN. 7 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.