The Tailpiece,union, cataloged under National Stock Number 4730-01-412-6841, 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-412-6841 |
| Primary Part Number | 801-6640797PC11 |
| 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 | 1.633 INCHES NOMINAL IN |
| Nominal Pipe Size Designation | 0.500 INCHES IN |
| End Connection Type | SWEAT SOLDER |
| Seat Type | GASKET |
| 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 |
|---|---|
| 801-6640797PC11 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6640797 | D/9 Drawing number reference only Naval Sea Systems Command |
| 2633-791-01 PC11 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-412-6841 is a Tailpiece,union, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-412-6841 has 1 manufacturer part number on file: 801-6640797PC11 (Naval Sea Systems Command).
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-417-2819, 4730-01-417-6210, 4730-01-417-6214. Verify interchangeability with system specifications before substitution.
Key specifications for 801-6640797PC11: Union Outside Diameter: 1.633 INCHES NOMINAL IN; Nominal Pipe Size Designation: 0.500 INCHES IN; End Connection Type: SWEAT SOLDER; Overall Length: 1.440 INCHES NOMINAL IN. 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.