The Thumbwheel, cataloged under National Stock Number 1270-01-230-2991, is classified within Federal Supply Class 1270 (Aircraft Gunnery Fire Control Components) of the Fire Control Equipment group. The manufacturer of record is Lockheed Martin Corp Electronics and Missiles Div. 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1270-01-230-2991 |
| Primary Part Number | 146274 |
| Item Name | Thumbwheel |
| FSC / FSG | 1270 / 12 — Aircraft Gunnery Fire Control Components |
| Manufacturer | Lockheed Martin Corp Electronics and Missiles Div |
| Status | ACTIVE |
| General Characteristics Item Description | MATERIAL IS MOLDED PHENOLIC PLASTIC PER MIL-M-14,1.24 IN. PORM 0.02 OVERALL DIAMETER 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 |
|---|---|
| 146274 PRIMARY | Lockheed Martin Corp Electronics and Missiles Div (USA) |
NSN 1270-01-230-2991 is a Thumbwheel, manufactured by Lockheed Martin Corp Electronics and Missiles Div, classified under FSC 1270, Aircraft Gunnery Fire Control Components. Status: active.
NSN 1270-01-230-2991 has 1 manufacturer part number on file: 146274 (Lockheed Martin Corp Electronics and Missiles Div).
1 possible match (shared part number, not a government interchangeability claim): 6110-01-388-0287. Verify interchangeability with system specifications before substitution.
Key specifications for 146274: General Characteristics Item Description: MATERIAL IS MOLDED PHENOLIC PLASTIC PER MIL-M-14,1.24 IN. PORM 0.02 OVERALL DIAMETER IN; End Item Identification: RF-4C AIRCRAFT. 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 1270-01-230-2991 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.