The Nut,tube Coupling, cataloged under National Stock Number 4730-00-737-5673, 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 U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-00-737-5673 |
| Primary Part Number | 7375673 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Length to Shoulder | 0.750 INCHES NOMINAL IN |
| Width Across Flats | 0.875 INCHES NOMINAL IN |
| Thread Series | UN |
| Material Document and Classification | QQ-S-637 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Seat Angle | 45.00 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.750 INCHES IN |
| Nut Height | 1.000 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | TUBE COUPLING |
| Thread Class | 2B |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 1212 OR STEEL COMP 1118 OVERALL |
| Fabrication Method | MACHINED |
| Smallest Inside Diameter | 0.260 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Nominal Tube Outside Diameter | 0.250 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 |
|---|---|
| 7375673 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 8106X8X4 | C/1 Advisory reference — outside the item-of-supply concept Danfoss Power Solutions II, Llc |
| 8106X8X4 | 5/9 Secondary reference Dana Corp Weatherhead Div |
NSN 4730-00-737-5673 is a Nut,tube Coupling, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-737-5673 has 1 manufacturer part number on file: 7375673 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 7375673: Length to Shoulder: 0.750 INCHES NOMINAL IN; Width Across Flats: 0.875 INCHES NOMINAL IN; Thread Series: UN; Material Document and Classification: QQ-S-637 FED SPEC ALL MATERIAL RESPONSES OVERALL. 16 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.