The Packing Nut, cataloged under National Stock Number 4730-01-421-5282, 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 Lenox Instrument Co., Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-421-5282 |
| Primary Part Number | 3353AS311-1 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Lenox Instrument Co., Inc. |
| Status | ACTIVE |
| Length to Shoulder | 0.188 INCHES NOMINAL IN |
| Width Across Flats | 0.156 INCHES NOMINAL IN |
| Thread Length | 0.125 INCHES NOMINAL IN |
| Style Designator | HEXAGON, INTERNAL THREAD, SHOULDERED |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 0.112-40 |
| Screw Thread Series Designator | UN |
| Thread Class | 2B |
| Major Unthreaded Outside Diameter | 0.156 INCHES NOMINAL IN |
| Screw Thread Location | INTERNAL |
| Material | COPPER ALLOY |
| Smallest Inside Diameter | 0.063 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 |
|---|---|
| 3353AS311-1 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 3353AS311-1 PRIMARY | Lenox Instrument Co., Inc. (USA) |
| Reference | Meaning |
|---|---|
| 3353AS311 | D/9 Drawing number reference only Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 4730-01-421-5282 is a Packing Nut, manufactured by Lenox Instrument Co., Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-421-5282 has 2 manufacturer part numbers on file: 3353AS311-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 3353AS311-1 (Lenox Instrument Co., Inc.).
Key specifications for 3353AS311-1: Length to Shoulder: 0.188 INCHES NOMINAL IN; Width Across Flats: 0.156 INCHES NOMINAL IN; Thread Length: 0.125 INCHES NOMINAL IN; Style Designator: HEXAGON, INTERNAL THREAD, SHOULDERED. 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.