The Nut,tube Coupling, cataloged under National Stock Number 4730-01-277-1329, 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 13 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-277-1329 |
| Primary Part Number | 1611X8 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Danfoss Power Solutions II, Llc |
| Status | ACTIVE |
| Width Across Flats | 0.812 INCHES NOMINAL IN |
| Thread Series | UNEF |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.688 INCHES IN |
| Nut Height | 1.000 INCHES NOMINAL IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| Material | COPPER ALLOY 360 OVERALL |
| Fabrication Method | FORGED OR MACHINED |
| Smallest Inside Diameter | 0.506 INCHES NOMINAL IN |
| Nominal Tube Outside Diameter | 0.500 INCHES 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 |
|---|---|
| 1611X8 PRIMARY | Danfoss Power Solutions II, Llc (USA) |
| Reference | Meaning |
|---|---|
| 161-F-8 | 5/9 Secondary reference Imperial |
| 161-F-8 | 5/9 Secondary reference Parker Hannifin Corp Hose Products Div |
| 61CL-8 | 3/2 Design control — primary reference U.S. Government activity |
| 1611X8 | 5/9 Secondary reference Dana Corp Weatherhead Div |
| 21611X8 | 5/9 Secondary reference Essex Brass Corporation |
NSN 4730-01-277-1329 is a Nut,tube Coupling, manufactured by Danfoss Power Solutions II, Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-277-1329 has 1 manufacturer part number on file: 1611X8 (Danfoss Power Solutions II, Llc).
Key specifications for 1611X8: Width Across Flats: 0.812 INCHES NOMINAL IN; Thread Series: UNEF; Seat Angle: 45.0 DEGREES NOMINAL; Thread Direction: RIGHT-HAND. 13 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.