The Packing Nut, cataloged under National Stock Number 4730-01-476-2810, 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 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-476-2810 |
| Primary Part Number | 845-7108535 ITEM 12 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Hole or Slot Quantity | 1 |
| Strength Rating | ERR-060 |
| Thread Length | 2.250 INCHES NOMINAL IN |
| Style Designator | ROUND SLOTTED, EXTERNAL THREAD, BOSS |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 2.250-16 |
| Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Thread Class | 3A A |
| Major Unthreaded Outside Diameter | 1.863 INCHES MINIMUM AND 1.864 INCHES MAXIMUM IN |
| Screw Thread Location | EXTERNAL |
| Material | COPPER ALLOY |
| Slot Width | 0.250 INCHES NOMINAL IN |
| Smallest Inside Diameter | 1.500 INCHES MINIMUM AND 1.502 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 |
|---|---|
| 845-7108535 ITEM 12 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 2643-825-85 ITEM 12 | 3/2 Design control — primary reference U.S. Government activity |
| 845-7108535 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4730-01-476-2810 is a Packing Nut, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-476-2810 has 1 manufacturer part number on file: 845-7108535 ITEM 12 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 4810-01-479-5429, 5305-01-709-0498. Verify interchangeability with system specifications before substitution.
Key specifications for 845-7108535 ITEM 12: Hole or Slot Quantity: 1; Strength Rating: ERR-060; Thread Length: 2.250 INCHES NOMINAL IN; Style Designator: ROUND SLOTTED, EXTERNAL THREAD, BOSS. 14 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.