The Packing Nut, cataloged under National Stock Number 4730-01-166-7446, 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 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-166-7446 |
| Primary Part Number | 810-2177525-C811-07 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 1.625 INCHES NOMINAL IN |
| Seat Angle in Deg | 45.0 |
| Thread Length | 1.187 INCHES NOMINAL AND 1.063 INCHES NOMINAL IN |
| Style Designator | HEXAGON, EXTERNAL THREAD, INVERTED FLARE |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 7/8-6 AND 1 1/2-12 |
| Screw Thread Series Designator | ACME AND UNF |
| Thread Class | 2G AND 2A A |
| Screw Thread Location | INTERNAL AND EXTERNAL |
| Material | COPPER ALLOY |
| Smallest Inside Diameter | 0.930 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 | S |
| Part Number | Manufacturer |
|---|---|
| 810-2177525-C811-07 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 803-2177525-X8XX-07 | 5/2 Secondary reference U.S. Government activity |
| 810-2177525-X8X | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 4730-01-166-7446 is a Packing Nut, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-166-7446 has 1 manufacturer part number on file: 810-2177525-C811-07 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5325-01-348-6523. Verify interchangeability with system specifications before substitution.
Key specifications for 810-2177525-C811-07: Width Across Flats: 1.625 INCHES NOMINAL IN; Seat Angle in Deg: 45.0; Thread Length: 1.187 INCHES NOMINAL AND 1.063 INCHES NOMINAL IN; Style Designator: HEXAGON, EXTERNAL THREAD, INVERTED FLARE. 12 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.