The Elbow,tube, cataloged under National Stock Number 4730-00-475-3918, 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 25 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-475-3918 |
| Primary Part Number | AS21908W12 |
| 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 | MIL-A-8625,TY2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE |
| Surface Treatment Document and Classification | MIL-A-8625,TY2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDEMIL-A-8625,TY2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE INSIDE |
| Connection Style | FLARELESS (TUBE) ALL ENDSFLARELESS (TUBE) ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDSTHREADED EXTERNAL TUBE ALL ENDS |
| Material Document and Classification | QQ-A-367,T73 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.750 INCHES ALL ENDS IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 1.625 INCHES NOMINAL SECOND END1.625 INCHES NOMINAL SECOND END IN |
| Leg Length | 2.469 INCHES NOMINAL FIRST END2.469 INCHES NOMINAL FIRST END IN |
| Nominal Thread Size | 1.062 INCHES ALL ENDS1.062 INCHES ALL ENDS IN |
| Nominal Thread Size | 1.062 INCHES FIRST END BULKHEAD1.062 INCHES FIRST END BULKHEAD IN |
| Seat Angle | 12.0 DEGREES ALL ENDS |
| Maximum Operating Temp | 135.0 CELSIUS SECOND RESPONSE135.0 CELSIUS SECOND RESPONSE DEGC |
| Maximum Operating Temp | -54.0 CELSIUS FIRST RESPONSE-54.0 CELSIUS FIRST RESPONSE DEGC |
| Surface Treatment | ANODIZE OUTSIDE |
| Surface Treatment | ANODIZE OUTSIDEANODIZE INSIDE |
| Media for Which Designed | AERONAUTICAL FLUID SINGLE RESPONSE |
| Thread Class | 3A ALL ENDS3A ALL ENDS A |
| Thread Class | 3A FIRST END BULKHEAD3A FIRST END BULKHEAD A |
| Thread Quantity Per Inch | 12 ALL ENDS12 ALL ENDS |
| Thread Quantity Per Inch | 12 FIRST END BULKHEAD12 FIRST END BULKHEAD |
| Material | ALUMINUM ALLOY 7075 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) FIRST END BULKHEAD |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) FIRST END BULKHEADUNIFIED NATIONAL JOINT (UNJ) 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 |
|---|---|
| AS21908W12 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| 4730PL2037283 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MS21908W12 | 5/9 Secondary reference U.S. Government activity |
| MS21908W12 | 5/9 Secondary reference U.S. Government activity |
| AS21908 | 5/9 Secondary reference U.S. Government activity |
| SAE-AS18280 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AS18280 | 5/9 Secondary reference Sae International Dba Sae International |
| MS21908W12 | 5/9 Secondary reference Sae International Dba Sae International |
| AS18280 | 5/9 Secondary reference U.S. Government activity |
| AS21908 | 5/9 Secondary reference Sae International Dba Sae International |
NSN 4730-00-475-3918 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 4730-00-475-3918 has 1 manufacturer part number on file: AS21908W12 (Sae International Dba Sae International).
Key specifications for AS21908W12: Flow Angle: 90.0 DEGREES; Surface Treatment Document and Classification: MIL-A-8625,TY2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE; Surface Treatment Document and Classification: MIL-A-8625,TY2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDEMIL-A-8625,TY2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE INSIDE; Connection Style: FLARELESS (TUBE) ALL ENDSFLARELESS (TUBE) ALL ENDS. 25 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.