The Nut,tube Coupling, cataloged under National Stock Number 4730-01-047-8341, 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 Tr Machine Co, Inc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-047-8341 |
| Primary Part Number | 16S454-7 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Tr Machine Co, Inc |
| Status | ACTIVE |
| Length to Shoulder | 0.680 INCHES MINIMUM AND 0.740 INCHES MAXIMUM IN |
| Width Across Flats | 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN |
| Thread Series | UNF |
| Seat Angle | 0.45 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.250 INCHES IN |
| Nut Height | 0.850 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL OVERALL |
| Smallest Inside Diameter | 0.803 INCHES MINIMUM AND 0.823 INCHES MAXIMUM IN |
| Nominal Tube Outside Diameter | 1.750 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 |
|---|---|
| 16S454-7 | Tr Machine Co, Inc (USA) |
| 16S454-7 | Aerospace & Commercial Technologies, Llc Dba Aerospace & Commercial Technologies Llc (USA) |
| 16S454-7 | Bright Lights Usa, Inc Dba Blusa Defense Manufacturing (USA) |
| 16S454-7 | T. R. Machine, Inc. (USA) |
| 16S454-7 | Chief Manufacturing Inc (USA) |
| Reference | Meaning |
|---|---|
| 16S454-7 | 5/9 Secondary reference Aviatrix Inc |
| 16S454-7 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-047-8341 is a Nut,tube Coupling, manufactured by Tr Machine Co, Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-047-8341 has 5 manufacturer part numbers on file: 16S454-7 (Tr Machine Co, Inc), 16S454-7 (Aerospace & Commercial Technologies, Llc Dba Aerospace & Commercial Technologies Llc), 16S454-7 (Bright Lights Usa, Inc Dba Blusa Defense Manufacturing), 16S454-7 (T. R. Machine, Inc.), 16S454-7 (Chief Manufacturing Inc).
Key specifications for 16S454-7: Length to Shoulder: 0.680 INCHES MINIMUM AND 0.740 INCHES MAXIMUM IN; Width Across Flats: 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN; Thread Series: UNF; Seat Angle: 0.45 DEGREES NOMINAL. 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.