The Restrictor,fluid Flow, cataloged under National Stock Number 4730-01-485-7541, 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 Danfoss Power Solutions II, Llc. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-485-7541 |
| Primary Part Number | FF1981-016-0404 |
| Item Name | Restrictor,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Danfoss Power Solutions II, Llc |
| Status | ACTIVE |
| Length | 1.140 INCHES NOMINAL IN |
| Thread Provision | THREADED FIRST PROVISION |
| Thread Provision | THREADED SECOND PROVISION |
| Design Type | TUBULAR, HEX SHAPE |
| Thread Series | UNF SECOND PROVISION |
| Thread Series | UNF FIRST PROVISION |
| Thread Length | 0.500 INCHES NOMINAL FIRST PROVISION IN |
| Thread Length | 0.500 INCHES NOMINAL SECOND PROVISION IN |
| Hose/tube Size for Which Designed | 1/4 IN. OD TUBE IN |
| Outside Diameter | 0.438 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND FIRST PROVISION |
| Thread Direction | RIGHT-HAND SECOND PROVISION |
| Thread Size Designator | 7/16-20 FIRST PROVISION |
| Thread Size Designator | 7/16-20 SECOND PROVISION |
| Thread Class | 2A FIRST PROVISION A |
| Thread Class | 2B SECOND PROVISION |
| Material | STEEL |
| Orifice Diameter | 0.016 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 |
|---|---|
| FF1981-016-0404 PRIMARY | Danfoss Power Solutions II, Llc (USA) |
| Reference | Meaning |
|---|---|
| FF19818-016-0404 | C/1 Advisory reference — outside the item-of-supply concept Danfoss Power Solutions II, Llc |
NSN 4730-01-485-7541 is a Restrictor,fluid Flow, manufactured by Danfoss Power Solutions II, Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-485-7541 has 1 manufacturer part number on file: FF1981-016-0404 (Danfoss Power Solutions II, Llc).
Key specifications for FF1981-016-0404: Length: 1.140 INCHES NOMINAL IN; Thread Provision: THREADED FIRST PROVISION; Thread Provision: THREADED SECOND PROVISION; Design Type: TUBULAR, HEX SHAPE. 18 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.