The Packing Nut, cataloged under National Stock Number 4730-00-400-6536, 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 Brp Us Inc. Government technical data includes 12 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-400-6536 |
| Primary Part Number | 305507 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Brp Us Inc |
| Status | ACTIVE |
| Width Across Flats | 0.438 INCHES NOMINAL IN |
| Seat Angle in Deg | 45.0 |
| Thread Length | 0.297 INCHES NOMINAL IN |
| Style Designator | HEXAGON, EXTERNAL THREAD, INVERTED FLARE |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 7/16-20 |
| Screw Thread Series Designator | UNF |
| Thread Class | 2A A |
| Screw Thread Location | INTERNAL |
| Material | COPPER ALLOY |
| Smallest Inside Diameter | 0.267 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 |
|---|---|
| 305507 PRIMARY | Brp Us Inc (USA) |
| Reference | Meaning |
|---|---|
| 305507 | 5/9 Secondary reference U.S. Government activity |
| 305507 | 5/9 Secondary reference Evinrude Motors Product Group of Outboard Marine Corp |
| 305507 | 5/9 Secondary reference Outboard Marine Corp Johnson Motors Div |
NSN 4730-00-400-6536 is a Packing Nut, manufactured by Brp Us Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-400-6536 has 1 manufacturer part number on file: 305507 (Brp Us Inc).
1 possible match (shared part number, not a government interchangeability claim): 5306-01-288-8934. Verify interchangeability with system specifications before substitution.
Key specifications for 305507: Width Across Flats: 0.438 INCHES NOMINAL IN; Seat Angle in Deg: 45.0; Thread Length: 0.297 INCHES NOMINAL IN; Style Designator: HEXAGON, EXTERNAL THREAD, INVERTED FLARE. 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.