The Coupling,tube, cataloged under National Stock Number 4730-01-436-2126, 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 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-01-436-2126 |
| Primary Part Number | 1741AS380-1 |
| Item Name | Coupling,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 6.450 INCHES SECOND END IN |
| Bolt Circle Nominal Diameter | 7.220 INCHES FIRST END IN |
| Nominal Overall Length | 8.800 INCHES IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | GROOVED BOTH ENDS |
| Bolt Hole Nominal Diameter | 0.578 INCHES SECOND END IN |
| Bolt Hole Nominal Diameter | 0.469 INCHES FIRST END IN |
| Nominal Outside Diameter | 6.500 INCHES SECOND END IN |
| Nominal Outside Diameter | 0.750 INCHES FIRST END IN |
| Bolt Hole Quantity | 8 SECOND END |
| Bolt Hole Quantity | 12 FIRST END |
| Material | STEEL OVERALL |
| Nominal Thickness | 0.250 INCHES FIRST END IN |
| Nominal Thickness | 1.370 INCHES SECOND 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 |
|---|---|
| 1741AS380-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 1741AS380 | D/9 Drawing number reference only Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 4730-01-436-2126 is a Coupling,tube, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-436-2126 has 1 manufacturer part number on file: 1741AS380-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 1741AS380-1: Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Bolt Circle Nominal Diameter: 6.450 INCHES SECOND END IN; Bolt Circle Nominal Diameter: 7.220 INCHES FIRST END IN. 16 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.