The Adapter Bushing, cataloged under National Stock Number 4730-01-255-2257, 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 Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc. Government technical data includes 3 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-255-2257 |
| Primary Part Number | 31141-N1Z160 |
| Item Name | Adapter Bushing |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| Status | ACTIVE |
| Width Across Flats | 1.367 INCHES MINIMUM AND 1.371 INCHES MAXIMUM IN |
| Wrenching Facility Shape | HEXAGON |
| Material | COPPER ALLOY 922 |
| 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 |
|---|---|
| 31141-N1Z160 PRIMARY | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| 1305-031 PC4,4.0IN | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| 31141-N | 3/1 Design control — primary reference Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| 1305-4IN-PC4 | 5/1 Secondary reference Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| 31141-N1 | 5/9 Secondary reference Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| 31141-N | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
NSN 4730-01-255-2257 is a Adapter Bushing, manufactured by Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-255-2257 has 2 manufacturer part numbers on file: 31141-N1Z160 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 1305-031 PC4,4.0IN (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc).
Key specifications for 31141-N1Z160: Width Across Flats: 1.367 INCHES MINIMUM AND 1.371 INCHES MAXIMUM IN; Wrenching Facility Shape: HEXAGON; Material: COPPER ALLOY 922. 3 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.