The Nut,tube Coupling, cataloged under National Stock Number 4730-01-723-2900, 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 Sae International Dba Sae International. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-723-2900 |
| Primary Part Number | AS5175W05 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Length to Shoulder | 0.579 INCHES NOMINAL IN |
| Width Across Flats | 0.615 INCHES MINIMUM AND 0.628 INCHES MAXIMUM IN |
| Shoulder Width | 0.484 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS2472 OR MIL-A-8625, TYPE II CLASS 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Largest Outside Diameter | 0.620 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | AMS-QQ-A-225/9 OR 7075 T7351 PER AMS4124 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.5000 INCHES IN |
| Nut Diameter | 0.374 INCHES MINIMUM AND 0.377 INCHES MAXIMUM IN |
| Nut Height | 0.678 INCHES MINIMUM AND 0.688 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE OVERALL |
| Nut Style | TUBE COUPLING |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | ALUMINUM ALLOY 7075 OVERALL |
| Fabrication Method | MACHINED |
| Smallest Inside Diameter | 0.374 INCHES MINIMUM AND 0.377 INCHES MAXIMUM IN |
| Nominal Tube Outside Diameter | 0.312 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 |
|---|---|
| AS5175W05 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| AS5175 | 5/1 Secondary reference Sae International Dba Sae International |
NSN 4730-01-723-2900 is a Nut,tube Coupling, manufactured by Sae International Dba Sae International, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-723-2900 has 1 manufacturer part number on file: AS5175W05 (Sae International Dba Sae International).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-731-2170. Verify interchangeability with system specifications before substitution.
Key specifications for AS5175W05: Length to Shoulder: 0.579 INCHES NOMINAL IN; Width Across Flats: 0.615 INCHES MINIMUM AND 0.628 INCHES MAXIMUM IN; Shoulder Width: 0.484 INCHES NOMINAL IN; Surface Treatment Document and Classification: AMS2472 OR MIL-A-8625, TYPE II CLASS 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 19 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.