The Standby Sight Drive, cataloged under National Stock Number 1270-01-184-2972, is classified within Federal Supply Class 1270 (Aircraft Gunnery Fire Control Components) of the Fire Control Equipment group. The manufacturer of record is Ge Aviation Systems Ltd. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1270-01-184-2972 |
| Primary Part Number | 40-657-5028E |
| Item Name | Standby Sight Drive |
| FSC / FSG | 1270 / 12 — Aircraft Gunnery Fire Control Components |
| Manufacturer | Ge Aviation Systems Ltd |
| Status | ACTIVE |
| General Characteristics Item Description | ALLOY PER MIL-STD-1276,TYPE K; 1.770 IN. LG; 1.181 IN. W; 0.197 IN. H IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 40-657-5028E | Ge Aviation Systems Ltd (GBR) |
| 40-657-5028E | Ge Aviation Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| 40-657-5028E | 5/9 Secondary reference Ge Aviation Systems Llc Dba Ge Aviation |
| 7020-908 | C/1 Advisory reference — outside the item-of-supply concept Spectrum Control Ltd Div Api Microelectronics Ltd |
| 7020-908 | 3/9 Design control — primary reference C-Mac Microcircuits Ltd |
NSN 1270-01-184-2972 is a Standby Sight Drive, manufactured by Ge Aviation Systems Ltd, classified under FSC 1270, Aircraft Gunnery Fire Control Components. Status: active.
NSN 1270-01-184-2972 has 2 manufacturer part numbers on file: 40-657-5028E (Ge Aviation Systems Ltd), 40-657-5028E (Ge Aviation Systems Llc).
Key specifications for 40-657-5028E: General Characteristics Item Description: ALLOY PER MIL-STD-1276,TYPE K; 1.770 IN. LG; 1.181 IN. W; 0.197 IN. H IN; End Item Identification: AIRCRAFT MODEL AV-8. 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 1270-01-184-2972 has DEMIL Code D. 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.