The Plug,tube Fitting,threaded, cataloged under National Stock Number 4730-01-392-3791, 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 Inventory Control Point Mechanicsburg. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-392-3791 |
| Primary Part Number | 595-6401090 ITEM 78SS |
| Item Name | Plug,tube Fitting,threaded |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Head Height | 0.249 INCHES NOMINAL IN |
| Criticality Code Justification | ZZZX |
| Style Designator | PLUG, MACHINE |
| Departure From Cited Designator | QUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR SUBSAFE ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 595-6401090 ITEM 78SS | Naval Inventory Control Point Mechanicsburg (USA) |
| MS18229-04TIYSS | Naval Inventory Control Point Mechanicsburg (USA) |
| 211053138SS | Naval Inventory Control Point Mechanicsburg (USA) |
| 6401090ITEM78SS | Naval Inventory Control Point Mechanicsburg (USA) |
| 6401175 ITEM 36SS | Naval Inventory Control Point Mechanicsburg (USA) |
| 595-6401175 ITEM 36SS | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 211053138 | 3/1 Design control — primary reference Naval Sea Systems Command |
| 6401175 ITEM 36 | 5/1 Secondary reference Naval Sea Systems Command |
| MS18229-04TIY | 2/1 Government specification standardization U.S. Government activity |
| 6401090ITEM78 | 5/1 Secondary reference Naval Sea Systems Command |
| 595-6401175 ITEM 36 | 5/1 Secondary reference Naval Sea Systems Command |
| 595-6401090 ITEM 78 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 4730-01-392-3791 is a Plug,tube Fitting,threaded, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-392-3791 has 6 manufacturer part numbers on file: 595-6401090 ITEM 78SS (Naval Inventory Control Point Mechanicsburg), MS18229-04TIYSS (Naval Inventory Control Point Mechanicsburg), 211053138SS (Naval Inventory Control Point Mechanicsburg), 6401090ITEM78SS (Naval Inventory Control Point Mechanicsburg), 6401175 ITEM 36SS (Naval Inventory Control Point Mechanicsburg) and 1 more.
1 possible match (shared part number, not a government interchangeability claim): 5365-01-442-9622. Verify interchangeability with system specifications before substitution.
Key specifications for 595-6401090 ITEM 78SS: Head Height: 0.249 INCHES NOMINAL IN; Criticality Code Justification: ZZZX; Style Designator: PLUG, MACHINE; Overall Length: 0.609 INCHES NOMINAL IN. 4 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.