The Nut,tube Coupling, cataloged under National Stock Number 4730-00-038-7015, 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 Satair A/s. Government technical data includes 17 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through both NSN and commercial part number lookups. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-038-7015 |
| Primary Part Number | MS51823-3 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Satair A/s |
| Status | ACTIVE |
| Length to Shoulder | 0.537 INCHES MINIMUM AND 0.552 INCHES MAXIMUM IN |
| Width Across Flats | 0.562 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | J514 ASSN STD SINGLE TREATMENT RESPONSE AND QQ-P-416, TY 2, CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNF |
| Seat Angle | 45.00 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.437 INCHES IN |
| Specification/standard Data | 96906-MS51823 GOVERNMENT STANDARD AND 81343-J514 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Nondefinitive Spec/std Data | 31 FIGURE |
| Nut Height | 0.680 INCHES MINIMUM AND 0.720 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | TUBE COUPLING |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Smallest Inside Diameter | 0.255 INCHES MINIMUM AND 0.258 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 |
|---|---|
| MS51823-3 | Satair A/s (DNK) |
| Reference | Meaning |
|---|---|
| MS51823-3 | 5/9 Secondary reference U.S. Government activity |
| MS51823-3 | 5/9 Secondary reference Imperial |
| MS51823-3 | 5/1 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| MS51823-3 | 2/2 Government specification standardization U.S. Government activity |
| MS51823-3 | 5/1 Secondary reference U.S. Government activity |
| MS51823-3 | 5/1 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division |
| 4730000387015 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| MIL-DTL-18866 | 4/1 Identification reference U.S. Government activity |
| MS51823-3 | 5/9 Secondary reference Aeroquip Corp Aerospace Div Gardena Plant |
| MS51823-3 | 5/9 Secondary reference U.S. Government activity |
| MS51823-3 | 5/9 Secondary reference Dana Corp Weatherhead Div |
| MS51823-3 | C/1 Advisory reference — outside the item-of-supply concept Danfoss Power Solutions II, Llc |
| MS51823-3 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| MS51823-3 | 5/1 Secondary reference Air-Way Manufacturing Company |
NSN 4730-00-038-7015 is a Nut,tube Coupling, manufactured by Satair A/s, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-038-7015 has 1 manufacturer part number on file: MS51823-3 (Satair A/s).
Key specifications for MS51823-3: Length to Shoulder: 0.537 INCHES MINIMUM AND 0.552 INCHES MAXIMUM IN; Width Across Flats: 0.562 INCHES NOMINAL IN; Surface Treatment Document and Classification: J514 ASSN STD SINGLE TREATMENT RESPONSE AND QQ-P-416, TY 2, CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNF. 17 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.