The Packing Nut, cataloged under National Stock Number 4730-01-433-8327, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-433-8327 |
| Primary Part Number | 512-6409366-19 |
| 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 | 1.312 INCHES NOMINAL IN |
| Width Across Flats | 1.312 INCHES NOMINAL IN |
| Largest Inside Diameter | 0.620 INCHES NOMINAL IN |
| Thread Length | 1.222 INCHES NOMINAL IN |
| Style Designator | HEXAGON, EXTERNAL THREAD, INTERNAL SHOUL DER |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 1-8 |
| Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Thread Class | 2A A |
| Screw Thread Location | EXTERNAL |
| Material | STEEL |
| Smallest Inside Diameter | 0.825 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 |
|---|---|
| 512-6409366-19 PRIMARY | Naval Sea Systems Command (USA) |
| 211083146 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6409366 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4730-01-433-8327 is a Packing Nut, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-433-8327 has 2 manufacturer part numbers on file: 512-6409366-19 (Naval Sea Systems Command), 211083146 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-434-6181. Verify interchangeability with system specifications before substitution.
Key specifications for 512-6409366-19: Length to Shoulder: 1.312 INCHES NOMINAL IN; Width Across Flats: 1.312 INCHES NOMINAL IN; Largest Inside Diameter: 0.620 INCHES NOMINAL IN; Thread Length: 1.222 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.