The Packing Nut, cataloged under National Stock Number 4730-01-040-3865, 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 Biomarine Inc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-01-040-3865 |
| Primary Part Number | 200-644 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Biomarine Inc |
| Status | ACTIVE |
| Length to Shoulder | 0.565 INCHES NOMINAL IN |
| Hole or Slot Quantity | 4 |
| Thread Length | 0.375 INCHES NOMINAL IN |
| Style Designator | ROUND, INTERNAL THREAD, SHOULDERED |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 4.000-12 |
| Screw Thread Series Designator | UN |
| Thread Class | 2B |
| Major Unthreaded Outside Diameter | 4.440 INCHES NOMINAL IN |
| Screw Thread Location | INTERNAL |
| Material | PLASTIC POLYVINYL CHLORIDE (PVC) |
| Smallest Inside Diameter | 3.610 INCHES NOMINAL IN |
| Hole Diameter | 0.115 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 |
NSN 4730-01-040-3865 is a Packing Nut, manufactured by Biomarine Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-040-3865 has 2 manufacturer part numbers on file: 400-201-5 (Biomarine Inc), 200-644 (Biomarine Inc).
Key specifications for 200-644: Length to Shoulder: 0.565 INCHES NOMINAL IN; Hole or Slot Quantity: 4; Thread Length: 0.375 INCHES NOMINAL IN; Style Designator: ROUND, INTERNAL THREAD, SHOULDERED. 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.