The Packing Nut, cataloged under National Stock Number 4730-01-026-0243, 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 Simmonds Precision Products Inc. Government technical data includes 15 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 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 | 4730-01-026-0243 |
| Primary Part Number | S4410 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Simmonds Precision Products Inc |
| Status | ACTIVE |
| Length to Shoulder | 1.000 INCHES NOMINAL IN |
| Width Across Flats | 1.240 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE |
| Thread Length | 0.880 INCHES NOMINAL IN |
| Style Designator | HEXAGON, INTERNAL THREAD, SHOULDERED |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 1.125-18 |
| Screw Thread Series Designator | UNEF |
| Surface Treatment | CHROMATE |
| Thread Class | 2B |
| Major Unthreaded Outside Diameter | 1.380 INCHES NOMINAL IN |
| Screw Thread Location | INTERNAL |
| Material | ALUMINUM ALLOY |
| Smallest Inside Diameter | 0.770 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 |
|---|---|
| S4410 PRIMARY | Simmonds Precision Products Inc (USA) |
NSN 4730-01-026-0243 is a Packing Nut, manufactured by Simmonds Precision Products Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-026-0243 has 1 manufacturer part number on file: S4410 (Simmonds Precision Products Inc).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-664-5970. Verify interchangeability with system specifications before substitution.
Key specifications for S4410: Length to Shoulder: 1.000 INCHES NOMINAL IN; Width Across Flats: 1.240 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE; Thread Length: 0.880 INCHES NOMINAL IN. 15 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.