The Packing Nut, cataloged under National Stock Number 4730-00-783-8741, 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 The Boeing Company Div Defense. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-783-8741 |
| Primary Part Number | 32-45088-3 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Length to Shoulder | 0.940 INCHES NOMINAL IN |
| Largest Inside Diameter | 4.962 INCHES NOMINAL IN |
| Style Designator | ROUND, EXTERNAL THREAD, INVERTED FLARE |
| Thread Size | 5-3/8IN.-16 IN |
| Screw Thread Series Designator | UN |
| Thread Class | 3A A |
| Major Unthreaded Outside Diameter | 6.400 INCHES NOMINAL IN |
| Screw Thread Location | EXTERNAL |
| Material | ALUMINUM ALLOY |
| Slot Width | 0.440 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 |
|---|---|
| 32-45088-3 | Skyspares Parts Inc (USA) |
| 32-45088-3 | Es3 Prime Logistics Group Inc Dba Es3 Plg (USA) |
| 1688-48 | Goodrich Corporation (USA) |
| 32-45088-3 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 1688-48 | 5/9 Secondary reference Goodrich Corporation Div Advanced Structures Landing Systems |
NSN 4730-00-783-8741 is a Packing Nut, manufactured by The Boeing Company Div Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-783-8741 has 4 manufacturer part numbers on file: 32-45088-3 (Skyspares Parts Inc), 32-45088-3 (Es3 Prime Logistics Group Inc Dba Es3 Plg), 1688-48 (Goodrich Corporation), 32-45088-3 (The Boeing Company Div Defense).
2 possible matches (shared part number, not a government interchangeability claim): 5935-01-019-1159, 4730-01-623-1750. Verify interchangeability with system specifications before substitution.
Key specifications for 32-45088-3: Length to Shoulder: 0.940 INCHES NOMINAL IN; Largest Inside Diameter: 4.962 INCHES NOMINAL IN; Style Designator: ROUND, EXTERNAL THREAD, INVERTED FLARE; Overall Length: 1.041 INCHES NOMINAL IN. 10 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.