The Packing Nut, cataloged under National Stock Number 4730-01-034-5395, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-034-5395 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Width Across Flats | 3.440 INCHES MINIMUM AND 3.560 INCHES MAXIMUM IN |
| Thread Length | 0.370 INCHES NOMINAL IN |
| Style Designator | IRREGULAR |
| Material Document and Classification | HMS-28 FSCM 95953 MFR REF SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 3.125-16 |
| Screw Thread Series Designator | UN |
| Thread Class | 2A A |
| Screw Thread Location | EXTERNAL |
| Material | COPPER ALLOY |
| Smallest Inside Diameter | 2.502 INCHES MINIMUM AND 2.506 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| A 3110 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-034-5395 is a Packing Nut, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5915-01-103-0822. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-034-5395: Width Across Flats: 3.440 INCHES MINIMUM AND 3.560 INCHES MAXIMUM IN; Thread Length: 0.370 INCHES NOMINAL IN; Style Designator: IRREGULAR; Material Document and Classification: HMS-28 FSCM 95953 MFR REF SINGLE MATERIAL RESPONSE. 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.