The Casing,detent Actuator Mechanism, cataloged under National Stock Number 1680-00-335-0440, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. The manufacturer of record is Aero Components, Llc. The record lists 5 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1680-00-335-0440 |
| Primary Part Number | 4F55439-129B |
| Item Name | Casing,detent Actuator Mechanism |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Manufacturer | Aero Components, Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4F55439-129B | Aero Components, Llc (USA) |
| 4F55439-129B | Triumph Controls, Llc Dba Triumph Controls, Llc (USA) |
| 4F55439-129B | Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc (USA) |
| 4F55439-129B | Williams Aerospace & Manufacturing Inc (USA) |
| 4F55439-129B | Cpi Aerostructures Inc (USA) |
| Reference | Meaning |
|---|---|
| 4F55439-129B | 3/2 Design control — primary reference U.S. Government activity |
| 4F55439-129B | 5/2 Secondary reference U.S. Government activity |
NSN 1680-00-335-0440 is a Casing,detent Actuator Mechanism, manufactured by Aero Components, Llc, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
NSN 1680-00-335-0440 has 5 manufacturer part numbers on file: 4F55439-129B (Aero Components, Llc), 4F55439-129B (Triumph Controls, Llc Dba Triumph Controls, Llc), 4F55439-129B (Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc), 4F55439-129B (Williams Aerospace & Manufacturing Inc), 4F55439-129B (Cpi Aerostructures Inc).
Key specifications for 4F55439-129B: End Item Identification: ACFT,MODEL C-5A A. 0 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 1680-00-335-0440 has DEMIL Code Q. 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.