The Bell Crank, cataloged under National Stock Number 3040-00-159-7264, 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 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3040-00-159-7264 |
| Primary Part Number | A51C21501-1 |
| Item Name | Bell Crank |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| FSC Application Data | FLIGHT CONTROL SYSTEM,ACFT |
| Bore Length | 1.375 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN |
| Criticality Code Justification | ABXV |
| Surface Treatment | ANODIZE |
| Bore Diameter | 0.7488 INCHES MINIMUM AND 0.7493 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| A51C21501-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51C21501-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A51C21501-1 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
NSN 3040-00-159-7264 is a Bell Crank, manufactured by Northrop Grumman Systems Corporation, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-159-7264 has 1 manufacturer part number on file: A51C21501-1 (Northrop Grumman Systems Corporation).
Key specifications for A51C21501-1: FSC Application Data: FLIGHT CONTROL SYSTEM,ACFT; Bore Length: 1.375 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN; Criticality Code Justification: ABXV; Surface Treatment: ANODIZE. 6 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.