The Tee,tube, cataloged under National Stock Number 4730-01-077-0304, 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 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-077-0304 |
| Primary Part Number | MS21909K6 |
| Item Name | Tee,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Connection Style | FLARELESS (TUBE) ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Nominal Outside Diameter Tube Accommodated | 0.375 INCHES ALL ENDS IN |
| Leg Length | 1.062 INCHES MINIMUM AND 1.109 INCHES MAXIMUM SECOND END IN |
| Leg Length | 1.062 INCHES MINIMUM AND 1.109 INCHES MAXIMUM FIRST END IN |
| Leg Length | 1.688 INCHES MINIMUM AND 1.735 INCHES MAXIMUM THIRD END IN |
| Nominal Thread Size | 0.563 INCHES ALL ENDS IN |
| Nominal Thread Size | 0.563 INCHES THIRD END BULKHEAD IN |
| Seat Angle | 12.0 DEGREES ALL ENDS |
| Specification/standard Data | 96906-MS21909 GOVERNMENT STANDARD |
| Surface Treatment | PASSIVATE INSIDE |
| Surface Treatment | PASSIVATE OUTSIDE |
| Thread Class | 3A ALL ENDS A |
| Thread Class | 3A THIRD END BULKHEAD A |
| Material | STEEL COMP 316 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) THIRD 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 |
|---|---|
| MS21909K6 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| SAE AS21909 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AS21909 | 5/9 Secondary reference Sae International Dba Sae International |
| 5749803 PC148 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| MS21909K6 | 5/9 Secondary reference U.S. Government activity |
| AS21909 | 5/9 Secondary reference U.S. Government activity |
| SAE-AS18280 | 5/1 Secondary reference Sae International Dba Sae International |
| MS21909K6 | 3/9 Design control — primary reference U.S. Government activity |
| AS18280 | 5/9 Secondary reference Sae International Dba Sae International |
| AS18280 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-01-077-0304 is a Tee,tube, manufactured by Sae International Dba Sae International, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-077-0304 has 1 manufacturer part number on file: MS21909K6 (Sae International Dba Sae International).
Key specifications for MS21909K6: Connection Style: FLARELESS (TUBE) ALL ENDS; Connection Type: THREADED EXTERNAL TUBE ALL ENDS; Nominal Outside Diameter Tube Accommodated: 0.375 INCHES ALL ENDS IN; Leg Length: 1.062 INCHES MINIMUM AND 1.109 INCHES MAXIMUM SECOND END IN. 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.