The Packing Nut, cataloged under National Stock Number 4730-01-270-6553, 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 W S Darley & Co. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-01-270-6553 |
| Primary Part Number | 2150300 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | W S Darley & Co |
| Status | ACTIVE |
| Width Across Flats | 1.125 INCHES NOMINAL IN |
| Style Designator | HEXAGON, INTERNAL THREAD, SHOULDERED |
| Thread Direction | RIGHT-HAND |
| Thread Size | 1.000-14 |
| Screw Thread Series Designator | UNS |
| Thread Class | 2B |
| Screw Thread Location | INTERNAL |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 051-00007-40 | Kovatch Corp. (USA) |
| 2150300 PRIMARY | W S Darley & Co (USA) |
| 001642T | Kovatch Corp. (USA) |
| Reference | Meaning |
|---|---|
| A449 | 5/9 Secondary reference W S Darley & Co |
NSN 4730-01-270-6553 is a Packing Nut, manufactured by W S Darley & Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-270-6553 has 3 manufacturer part numbers on file: 051-00007-40 (Kovatch Corp.), 2150300 (W S Darley & Co), 001642T (Kovatch Corp.).
Key specifications for 2150300: Width Across Flats: 1.125 INCHES NOMINAL IN; Style Designator: HEXAGON, INTERNAL THREAD, SHOULDERED; Thread Direction: RIGHT-HAND; Thread Size: 1.000-14. 8 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.