The Guard,ejection Seat Switch, cataloged under National Stock Number 4920-01-155-2069, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is The Boeing Company Div Legacy Am&m. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4920-01-155-2069 |
| Primary Part Number | 12A41000-001 |
| Item Name | Guard,ejection Seat Switch |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | The Boeing Company Div Legacy Am&m |
| Status | ACTIVE |
| Functional Description | GUARD USED SO THAT THE EJECTION SEAT DOES NOT INADVERTENTLY PUSH THE SWITCH PLUNGER TOO DEEP TO DAMAGE THE SWITCH |
| 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 |
|---|---|
| 12A41000-001 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
| Reference | Meaning |
|---|---|
| 12A41000-001 | 5/9 Secondary reference The Boeing Company Dba Boeing |
| R-TBD-411 | 5/9 Secondary reference The Boeing Company Div Legacy Am&m |
NSN 4920-01-155-2069 is a Guard,ejection Seat Switch, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-01-155-2069 has 1 manufacturer part number on file: 12A41000-001 (The Boeing Company Div Legacy Am&m).
Key specifications for 12A41000-001: Functional Description: GUARD USED SO THAT THE EJECTION SEAT DOES NOT INADVERTENTLY PUSH THE SWITCH PLUNGER TOO DEEP TO DAMAGE THE SWITCH; Part Name Assigned by Controlling Agency: EJECTION SEAT SWITCH GUARD; End Item Identification: B-1B ACFT AGE.. 1 specification is 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.