The Connecting Link,rigid, cataloged under National Stock Number 3040-01-121-4591, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-121-4591 |
| Primary Part Number | A51B72504-1 |
| Item Name | Connecting Link,rigid |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Body Diameter | 0.750 INCHES NOMINAL IN |
| Body Construction | SOLID |
| Link Style | EYE ENDS |
| Material | STEEL |
| Body Thickness | 0.432 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A51B72504-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51B72504-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A51B72504-1 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
NSN 3040-01-121-4591 is a Connecting Link,rigid, manufactured by Northrop Grumman Systems Corporation, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-121-4591 has 1 manufacturer part number on file: A51B72504-1 (Northrop Grumman Systems Corporation).
Key specifications for A51B72504-1: Body Diameter: 0.750 INCHES NOMINAL IN; Body Construction: SOLID; Link Style: EYE ENDS; Overall Length: 5.490 INCHES NOMINAL IN. 5 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.
NSN 3040-01-121-4591 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.