The Packing Nut, cataloged under National Stock Number 4730-01-232-8481, 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 Kidde Technologies, Inc Div Kidde Aerospace and Defense. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-232-8481 |
| Primary Part Number | 249560 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Kidde Technologies, Inc Div Kidde Aerospace and Defense |
| Status | ACTIVE |
| Length to Shoulder | 0.350 INCHES NOMINAL IN |
| Width Across Flats | 2.415 INCHES NOMINAL IN |
| Thread Length | 0.475 INCHES NOMINAL IN |
| Style Designator | HEXAGON, INTERNAL THREAD, SHOULDERED |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | CASEHARDENED |
| Thread Size | 2-1/8 |
| Screw Thread Series Designator | UN |
| Thread Class | 3B |
| Screw Thread Location | INTERNAL |
| Material | ALUMINUM ALLOY |
| Smallest Inside Diameter | 1.872 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 |
|---|---|
| 249560 PRIMARY | Kidde Technologies, Inc Div Kidde Aerospace and Defense (USA) |
| Reference | Meaning |
|---|---|
| 249560 | 5/9 Secondary reference Kidde-Fenwal, Llc |
NSN 4730-01-232-8481 is a Packing Nut, manufactured by Kidde Technologies, Inc Div Kidde Aerospace and Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-232-8481 has 1 manufacturer part number on file: 249560 (Kidde Technologies, Inc Div Kidde Aerospace and Defense).
1 possible match (shared part number, not a government interchangeability claim): 6640-01-271-1364. Verify interchangeability with system specifications before substitution.
Key specifications for 249560: Length to Shoulder: 0.350 INCHES NOMINAL IN; Width Across Flats: 2.415 INCHES NOMINAL IN; Thread Length: 0.475 INCHES NOMINAL IN; Style Designator: HEXAGON, INTERNAL THREAD, SHOULDERED. 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.