The Tailpiece,union, cataloged under National Stock Number 4730-01-239-9235, 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 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-239-9235 |
| Primary Part Number | 6394890 FIND 005 |
| Item Name | Tailpiece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Seat Type | STRAIGHT FACE |
| Tubing Outside Diameter | 0.250 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE |
| Material | STEEL COMP 316 |
| 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 |
|---|---|
| 6394890 FIND 005 | Naval Sea Systems Command (USA) |
| MT308-4CE | Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc (USA) |
| 5793190-018 FIND 084 | Naval Sea Systems Command (USA) |
| 6394888 FIND 005 | Naval Sea Systems Command (USA) |
| 7326692-08 FIND 015 | Naval Sea Systems Command (USA) |
| 7326038 FIND 002 | Naval Sea Systems Command (USA) |
| 0451C0024-1 | Lockheed Martin Corporation Div Rms (USA) |
| 6394889 FIND 005 | Naval Sea Systems Command (USA) |
| 6394892 FIND 005 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 0451C0024 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
| 0451C0024 | 7/2 Vendor item drawing reference Lockheed Martin Corporation Div Rms |
| 0451C0024-1 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
| 6534C593-1 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| H849R-4-SS | 3/2 Design control — primary reference U.S. Government activity |
| H849R-4 | C/1 Advisory reference — outside the item-of-supply concept Peterson Harry S Co Inc |
NSN 4730-01-239-9235 is a Tailpiece,union, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-239-9235 has 9 manufacturer part numbers on file: 6394890 FIND 005 (Naval Sea Systems Command), MT308-4CE (Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc), 5793190-018 FIND 084 (Naval Sea Systems Command), 6394888 FIND 005 (Naval Sea Systems Command), 7326692-08 FIND 015 (Naval Sea Systems Command) and 4 more.
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-383-5025, 4730-01-387-8382. Verify interchangeability with system specifications before substitution.
Key specifications for 6394890 FIND 005: Overall Length: 0.375 INCHES NOMINAL IN; Seat Type: STRAIGHT FACE; Tubing Outside Diameter: 0.250 INCHES NOMINAL IN; Surface Treatment: PASSIVATE. 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.