The Packing Nut, cataloged under National Stock Number 4730-01-144-9334, 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 13 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-144-9334 |
| Primary Part Number | 820-5348328 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Length to Shoulder | 1.000 INCHES MINIMUM AND 1.025 INCHES MAXIMUM IN |
| Thread Length | 0.750 INCHES NOMINAL IN |
| Style Designator | KNURLED, INTERNAL THREAD, SHOULDERED |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 2-1/2-12 |
| Screw Thread Series Designator | UN |
| Thread Class | 3B |
| Major Unthreaded Outside Diameter | 2.938 INCHES NOMINAL IN |
| Screw Thread Location | INTERNAL |
| Material | COPPER ALLOY 642 |
| Smallest Inside Diameter | 1.000 INCHES NOMINAL IN |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY FREE FROM MERCURY CONTAMINATION |
| 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 |
|---|---|
| 820-5348328 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 1258143 PIECE 6 | 3/9 Design control — primary reference Asset Systems, Inc. Dba Asset Systems Inc |
| 1258143 | 5/9 Secondary reference Asset Systems, Inc. Dba Asset Systems Inc |
| 1258143 PC 6 | 5/9 Secondary reference Apv Gaulin Inc |
NSN 4730-01-144-9334 is a Packing Nut, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-144-9334 has 1 manufacturer part number on file: 820-5348328 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-528-8078. Verify interchangeability with system specifications before substitution.
Key specifications for 820-5348328: Length to Shoulder: 1.000 INCHES MINIMUM AND 1.025 INCHES MAXIMUM IN; Thread Length: 0.750 INCHES NOMINAL IN; Style Designator: KNURLED, INTERNAL THREAD, SHOULDERED; Overall Length: 1.375 INCHES NOMINAL IN. 13 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.