The Nut,tube Coupling, cataloged under National Stock Number 4730-01-294-8920, 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 G H Fittings A/s. Government technical data includes 11 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-294-8920 |
| Primary Part Number | 191B.0254X1 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | G H Fittings A/s |
| Status | ACTIVE |
| Length to Shoulder | 0.590 INCHES NOMINAL IN |
| Width Across Flats | 1.500 INCHES NOMINAL IN |
| Criticality Code Justification | FEAT |
| Material Document and Classification | ASTM-B16 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.000 INCHES IN |
| Nut Height | 0.680 INCHES NOMINAL IN |
| Nut Style | TUBE COUPLING |
| Material | COPPER ALLOY OVERALL |
| Smallest Inside Diameter | 1.000 INCHES NOMINAL IN |
| Nominal Tube Outside Diameter | 1.000 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 191B.0254X1 | G H Fittings A/s (NOR) |
| Reference | Meaning |
|---|---|
| 5-45-5161 | 5/9 Secondary reference U.S. Government activity |
| 19440-1 | C/1 Advisory reference — outside the item-of-supply concept Drs Environmental Systems Inc |
| 19440-1 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4730-01-294-8920 is a Nut,tube Coupling, manufactured by G H Fittings A/s, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-294-8920 has 1 manufacturer part number on file: 191B.0254X1 (G H Fittings A/s).
1 possible match (shared part number, not a government interchangeability claim): 5855-01-568-6840. Verify interchangeability with system specifications before substitution.
Key specifications for 191B.0254X1: Length to Shoulder: 0.590 INCHES NOMINAL IN; Width Across Flats: 1.500 INCHES NOMINAL IN; Criticality Code Justification: FEAT; Material Document and Classification: ASTM-B16 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 11 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.