The Tee,flange to Boss, cataloged under National Stock Number 4730-01-261-6590, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 23 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-261-6590 |
| Item Name | Tee,flange to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Flange Shape | RECTANGULAR WITH HOLES THIRD END |
| Flange Face Design | PLAIN THIRD ENDUNABLE TO DECODE |
| Connection Style | GASKET SEAL (BOSS) FIRST END |
| Connection Style | GASKET SEAL (BOSS) SECOND END |
| Nominal Length | 1.500 INCHES THIRD END IN |
| Connection Type | THREADED INTERNAL BOSS FIRST END |
| Connection Type | THREADED INTERNAL BOSS SECOND END |
| Connection Type | FLANGE THIRD END |
| Material Document and Classification | QQ-A-200/8 FED SPEC SINGLE MATERIAL RESPONSE OVERALLUNABLE TO DECODE |
| Bolt Hole Nominal Diameter | 0.625 INCHES THIRD END IN |
| Leg Length | 0.700 INCHES NOMINAL THIRD END IN |
| Leg Length | 1.980 INCHES NOMINAL FIRST END IN |
| Leg Length | 1.980 INCHES NOMINAL SECOND END IN |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 1.500 INCHES THIRD END IN |
| Bolt Hole Quantity | 2 THIRD END |
| Nominal Width | 2.000 INCHES THIRD END IN |
| Thread Class | 3B SECOND END |
| Thread Class | 3B FIRST END |
| Material | ALUMINUM ALLOY 6061 OVERALLUNABLE TO DECODE |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) SECOND END |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 640-1479 | D/9 Drawing number reference only Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| 640-1479-001 | 3/9 Design control — primary reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| 640-1479-001 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4730-01-261-6590 is a Tee,flange to Boss, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-261-6590: Flange Shape: RECTANGULAR WITH HOLES THIRD END; Flange Face Design: PLAIN THIRD ENDUNABLE TO DECODE; Connection Style: GASKET SEAL (BOSS) FIRST END; Connection Style: GASKET SEAL (BOSS) SECOND END. 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.