The Nut,tube Coupling, cataloged under National Stock Number 4730-00-775-9740, 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 Mueller Brass Co.. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-775-9740 |
| Primary Part Number | A5228 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Mueller Brass Co. |
| Status | ACTIVE |
| Width Across Flats | 1.062 INCHES NOMINAL IN |
| Thread Series | UNF |
| Seat Angle | 45.00 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.875 INCHES IN |
| Nut Height | 0.938 INCHES NOMINAL IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 2B |
| Thread Quantity Per Inch | 14 |
| Material | COPPER ALLOY OVERALL |
| Smallest Inside Diameter | 0.500 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 |
|---|---|
| A5228 PRIMARY | Mueller Brass Co. (USA) |
| Reference | Meaning |
|---|---|
| 14FS-10-8 | 3/2 Design control — primary reference U.S. Government activity |
| 11110X8 | 5/9 Secondary reference Essex Brass Corporation |
NSN 4730-00-775-9740 is a Nut,tube Coupling, manufactured by Mueller Brass Co., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-775-9740 has 1 manufacturer part number on file: A5228 (Mueller Brass Co.).
Key specifications for A5228: Width Across Flats: 1.062 INCHES NOMINAL IN; Thread Series: UNF; Seat Angle: 45.00 DEGREES NOMINAL; Thread Direction: RIGHT-HAND. 12 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.