The Gearhead Assy, cataloged under National Stock Number 1680-01-207-5239, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. The manufacturer of record is Thomas Instrument, Incorporated. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1680-01-207-5239 |
| Primary Part Number | NF203598-1 |
| Item Name | Gearhead Assy |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Manufacturer | Thomas Instrument, Incorporated |
| Status | ACTIVE |
| General Characteristics Item Description | FLIGHT CONTROL |
| 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 |
|---|---|
| NF203598-1 | Thomas Instrument, Incorporated (USA) |
| Reference | Meaning |
|---|---|
| NF203598-1 | 3/9 Design control — primary reference Speco Corp |
| ROCKWELL COLLINS | 5/2 Secondary reference U.S. Government activity |
NSN 1680-01-207-5239 is a Gearhead Assy, manufactured by Thomas Instrument, Incorporated, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
NSN 1680-01-207-5239 has 1 manufacturer part number on file: NF203598-1 (Thomas Instrument, Incorporated).
Key specifications for NF203598-1: General Characteristics Item Description: FLIGHT CONTROL; End Item Identification: B-1B ACFT. 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.
NSN 1680-01-207-5239 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.