The Elbow,flange to Boss, cataloged under National Stock Number 4730-01-261-6589, 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 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-261-6589 |
| Primary Part Number | 640-1456-001 |
| Item Name | Elbow,flange to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| Status | ACTIVE |
| Recess Nominal Depth | 0.121 INCHES FIRST END IN |
| Flange Shape | RECTANGULAR WITH HOLES FIRST END |
| Flange Face Design | RECESSED WITH GASKET GROOVE FIRST END |
| Connection Style | GASKET SEAL (BOSS) SECOND END |
| Nominal Length | 2.880 INCHES FIRST END IN |
| Connection Type | THREADED INTERNAL BOSS SECOND END |
| Connection Type | FLANGE FIRST END |
| Material Document and Classification | QQ-S-763,COND-A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Bolt Hole Nominal Diameter | 0.438 INCHES FIRST END IN |
| Leg Length | 2.120 INCHES NOMINAL FIRST END IN |
| Leg Length | 1.440 INCHES NOMINAL SECOND END IN |
| Nominal Thread Size | 1.312 INCHES SECOND END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 1.062 INCHES FIRST END IN |
| Nominal Width | 2.380 INCHES FIRST END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 2.062 INCHES FIRST END IN |
| Thread Quantity Per Inch | 12 SECOND END |
| Material | STEEL COMP 304 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) SECOND END |
| Recess Nominal Diameter | 0.875 INCHES FIRST END IN |
| 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 |
|---|---|
| 640-1456-001 PRIMARY | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA) |
| Reference | Meaning |
|---|---|
| 640-1456 | D/9 Drawing number reference only Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
NSN 4730-01-261-6589 is a Elbow,flange to Boss, manufactured by Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-261-6589 has 1 manufacturer part number on file: 640-1456-001 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems).
Key specifications for 640-1456-001: Recess Nominal Depth: 0.121 INCHES FIRST END IN; Flange Shape: RECTANGULAR WITH HOLES FIRST END; Flange Face Design: RECESSED WITH GASKET GROOVE FIRST END; Connection Style: GASKET SEAL (BOSS) SECOND END. 19 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.