The Nut,union, cataloged under National Stock Number 4730-01-138-3005, 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 Emerson Automation Solutions Final Control Us Lp Div Navy Product Team. Government technical data includes 15 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-138-3005 |
| Primary Part Number | 03890 203 130 |
| Item Name | Nut,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| Status | ACTIVE |
| Width Across Flats | 0.800 INCHES NOMINAL IN |
| Shoulder Step Width | 0.438 INCHES NOMINAL IN |
| Shoulder Width | 0.562 INCHES NOMINAL IN |
| Thread Series | UNF |
| Temp Rating | 425.0 FAHRENHEIT MAXIMUM DEGF |
| Maximum Working Pressure Rating and Service for Which Designed | 100.0 POUNDS PER SQUARE INCH (PSI) WATER LBS |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.531 INCHES IN |
| Nut Height | 1.438 INCHES NOMINAL IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 18 |
| Material | COPPER ALLOY OVERALL |
| Smallest Inside Diameter | 0.375 INCHES NOMINAL IN |
| Shoulder Seat Diameter | 0.748 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 |
|---|---|
| NMP-603 PIECE 26 | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| 03890 203 130 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| NMP-603 PIECE 26 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| 03890 203 130 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| NMP-603 | D/9 Drawing number reference only Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| 03890 203 130 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| NMP-603 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| 052.103.0003 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| NMP-603 PIECE 26 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
NSN 4730-01-138-3005 is a Nut,union, manufactured by Emerson Automation Solutions Final Control Us Lp Div Navy Product Team, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-138-3005 has 2 manufacturer part numbers on file: NMP-603 PIECE 26 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 03890 203 130 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-347-7312, 4730-01-398-3478, 4820-01-398-5479. Verify interchangeability with system specifications before substitution.
Key specifications for 03890 203 130: Width Across Flats: 0.800 INCHES NOMINAL IN; Shoulder Step Width: 0.438 INCHES NOMINAL IN; Shoulder Width: 0.562 INCHES NOMINAL IN; Thread Series: UNF. 15 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.