The Packing Nut, cataloged under National Stock Number 4730-00-273-9964, 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 Naval Sea Systems Command. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 13 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-273-9964 |
| Primary Part Number | YN1S61-882PC4419 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Length to Shoulder | 0.750 INCHES NOMINAL IN |
| Seat Angle in Deg | 30.0 |
| Hole or Slot Quantity | 6 |
| Largest Inside Diameter | 1.312 INCHES NOMINAL IN |
| Thread Length | 0.500 INCHES NOMINAL IN |
| Style Designator | ROUND, EXTERNAL THREAD, INVERTED FLARE |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 1.375-18 |
| Screw Thread Series Designator | UNEF |
| Thread Class | 2A A |
| Major Unthreaded Outside Diameter | 1.563 INCHES NOMINAL IN |
| Screw Thread Location | EXTERNAL |
| Material | COPPER ALLOY |
| Slot Width | 0.406 INCHES NOMINAL IN |
| Smallest Inside Diameter | 0.885 INCHES MINIMUM AND 0.890 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 |
| Part Number | Manufacturer |
|---|---|
| YN1S61-882PC4419 | Naval Sea Systems Command (USA) |
| AMC13S41-472PC5B | Naval Sea Systems Command (USA) |
| YN29S61-0171PC44 | Naval Sea Systems Command (USA) |
| 81829S4105-50235 | Naval Sea Systems Command (USA) |
| AMC13S41-49PC5B | Naval Sea Systems Command (USA) |
| 5B8234 | Caterpillar Inc Div Caterpillar Defense (USA) |
| AMC13S41-52PC5B8 | Naval Sea Systems Command (USA) |
| AMC13S41-195PC5B | Naval Sea Systems Command (USA) |
| AMC13S41-82PC5B8 | Naval Sea Systems Command (USA) |
| 4040898 | Agco Corp Parts Opn (USA) |
| AMC13S41-523PC5B | Naval Sea Systems Command (USA) |
| AMC13S41-493PC5B | Naval Sea Systems Command (USA) |
| AMC13S41-216PC5B | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| AMC13S41-472PC5B | 5/9 Secondary reference U.S. Government activity |
| YN1S61-882PC4419 | 5/9 Secondary reference U.S. Government activity |
| AMC13S41-493PC5B | 5/9 Secondary reference U.S. Government activity |
| AMC13S41-82PC5B8 | 5/9 Secondary reference U.S. Government activity |
| AMC13S41-52PC5B8 | 5/9 Secondary reference U.S. Government activity |
| AMC13S41-195PC5B | 5/9 Secondary reference U.S. Government activity |
| 4419R | 3/9 Design control — primary reference Lear Siegler Inc Sherwood Div |
| AMC13S41-49PC5B | 5/9 Secondary reference U.S. Government activity |
| YN29S61-0171PC44 | 5/9 Secondary reference U.S. Government activity |
| AMC13S41-523PC5B | 5/9 Secondary reference U.S. Government activity |
| AMC13S41-216PC5B | 5/9 Secondary reference U.S. Government activity |
| 81829S4105-50235 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-00-273-9964 is a Packing Nut, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-273-9964 has 13 manufacturer part numbers on file: YN1S61-882PC4419 (Naval Sea Systems Command), AMC13S41-472PC5B (Naval Sea Systems Command), YN29S61-0171PC44 (Naval Sea Systems Command), 81829S4105-50235 (Naval Sea Systems Command), AMC13S41-49PC5B (Naval Sea Systems Command) and 8 more.
Key specifications for YN1S61-882PC4419: Length to Shoulder: 0.750 INCHES NOMINAL IN; Seat Angle in Deg: 30.0; Hole or Slot Quantity: 6; Largest Inside Diameter: 1.312 INCHES NOMINAL IN. 16 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.