The Tailpiece,union, cataloged under National Stock Number 4730-01-399-0959, 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 Circor Naval Solutions Llc Dba Warren Pumps. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-399-0959 |
| Primary Part Number | R1223-57 |
| Item Name | Tailpiece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Circor Naval Solutions Llc Dba Warren Pumps |
| Status | ACTIVE |
| Material | NICKEL ALLOY 400 |
| 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 |
|---|---|
| R1223-57 PRIMARY | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| Reference | Meaning |
|---|---|
| H804R-6-MONEL | 5/2 Secondary reference U.S. Government activity |
| PL-999F0815-57 | 5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps |
| 999F0815 | D/9 Drawing number reference only Circor Naval Solutions Llc Dba Warren Pumps |
NSN 4730-01-399-0959 is a Tailpiece,union, manufactured by Circor Naval Solutions Llc Dba Warren Pumps, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-399-0959 has 1 manufacturer part number on file: R1223-57 (Circor Naval Solutions Llc Dba Warren Pumps).
3 possible matches (shared part number, not a government interchangeability claim): 4730-01-399-0960, 4710-01-411-5551, 3040-01-411-6249. Verify interchangeability with system specifications before substitution.
Key specifications for R1223-57: Special Features: TUBE SIZE 0.380; End Item Identification: PUMP, CENTRIFUGE; Material: NICKEL ALLOY 400. 1 specification is 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.