The Elbow,tube, cataloged under National Stock Number 4730-00-640-0831, 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 24 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-640-0831 |
| Primary Part Number | MS21908D12 |
| 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-A8625,TYPE 2,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | FLARELESS (TUBE) ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Material Document and Classification | QQ-A-367,T6 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 END IN |
| Leg Length | 2.469 INCHES NOMINAL FIRST END IN |
| Nominal Thread Size | 1.062 INCHES FIRST END BULKHEAD IN |
| Nominal Thread Size | 1.062 INCHES ALL ENDS IN |
| Seat Angle | 12.0 DEGREES ALL ENDS |
| Specification/standard Data | 96906-MS21908 GOVERNMENT STANDARD |
| Maximum Operating Temp | 275.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Surface Treatment | ANODIZE OVERALL |
| Media for Which Designed | OXYGEN, GASEOUS SECOND RESPONSE |
| Media for Which Designed | HYDRAULIC FLUID FIRST RESPONSE |
| Thread Class | 3A FIRST END BULKHEAD A |
| Thread Class | 3A ALL ENDS A |
| Thread Quantity Per Inch | 12 FIRST END BULKHEAD |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | ALUMINUM ALLOY 2014 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) FIRST END BULKHEAD |
| Thread Series Designator | UNIFIED 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 |
|---|---|
| ER833D12 | Danfoss Power Solutions II, Llc (USA) |
| MS21908D12 | Transdigm Inc Div Adelwiggins Group (USA) |
| MS21908D12 | Wesco Aircraft Hardware Corp. Dba Incora (USA) |
| 137618344 | Leonardo S.p.a. - Electronics Division - Defence Business Area (ITA) |
| MS21908D12 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| MS21908D12 | 5/9 Secondary reference Faber Enterprises, Inc. Div Faber Enterprise Inc |
| 4730PL0803301 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MS21908D12 | 5/9 Secondary reference U.S. Government activity |
| ER833D12 | 5/9 Secondary reference Dana Corp Weatherhead Div |
| AS21908 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AS21908 | 5/9 Secondary reference U.S. Government activity |
| MS21908D12 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-00-640-0831 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 4730-00-640-0831 has 5 manufacturer part numbers on file: ER833D12 (Danfoss Power Solutions II, Llc), MS21908D12 (Transdigm Inc Div Adelwiggins Group), MS21908D12 (Wesco Aircraft Hardware Corp. Dba Incora), 137618344 (Leonardo S.p.a. - Electronics Division - Defence Business Area), MS21908D12 (Sae International Dba Sae International).
Key specifications for MS21908D12: Flow Angle: 90.0 DEGREES; Surface Treatment Document and Classification: MIL-A8625,TYPE 2,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Connection Style: FLARELESS (TUBE) ALL ENDS; Connection Type: THREADED EXTERNAL TUBE ALL ENDS. 24 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.