The Elbow,tube, cataloged under National Stock Number 4730-01-073-3771, 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 23 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-073-3771 |
| Primary Part Number | MS21925-4 |
| Item Name | Elbow,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Flow Angle | 90.0 DEGREES |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | FLARELESS (TUBE) ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE FIRST END BULKHEAD |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Material Document and Classification | QQ-S-637 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES ALL ENDS IN |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END BULKHEAD IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 0.940 INCHES MINIMUM AND 0.987 INCHES MAXIMUM SECOND END IN |
| Leg Length | 1.756 INCHES MINIMUM AND 1.803 INCHES MAXIMUM FIRST END IN |
| Nominal Thread Size | 0.438 INCHES FIRST END BULKHEAD IN |
| Nominal Thread Size | 0.438 INCHES ALL ENDS IN |
| Seat Angle | 12.0 DEGREES ALL ENDS |
| Specification/standard Data | 96906-MS21925 GOVERNMENT STANDARD |
| Maximum Operating Temp | 275.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Surface Treatment | CADMIUM OVERALL |
| Media for Which Designed | FLUID SINGLE RESPONSE |
| Thread Class | 3A FIRST END BULKHEAD A |
| Thread Class | 3A ALL ENDS A |
| Material | STEEL COMP 1137 OR STEEL COMP 1141 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END BULKHEAD |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS |
| 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 |
|---|---|
| MS21925-4 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| SAE-AS18280 | 3/1 Design control — primary reference Sae International Dba Sae International |
| MS21925-4 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-01-073-3771 is a Elbow,tube, manufactured by Sae International Dba Sae International, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-073-3771 has 1 manufacturer part number on file: MS21925-4 (Sae International Dba Sae International).
Key specifications for MS21925-4: Flow Angle: 90.0 DEGREES; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Connection Style: FLARELESS (TUBE) ALL ENDS; Connection Type: THREADED EXTERNAL TUBE FIRST END BULKHEAD. 23 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.