The Periscope Subassembly, cataloged under National Stock Number 1240-01-381-0336, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Naval Sea Systems Command. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-381-0336 |
| Primary Part Number | 6690466-1,2,3 |
| Item Name | Periscope Subassembly |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Major Components | FAIRING 2,I SECTION 1 |
| 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 |
|---|---|
| 6690466-1,2,3 | Naval Sea Systems Command (USA) |
| 400-6690466-1,2,3 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 400-6690466-1,2,3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1240-01-381-0336 is a Periscope Subassembly, manufactured by Naval Sea Systems Command, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-381-0336 has 2 manufacturer part numbers on file: 6690466-1,2,3 (Naval Sea Systems Command), 400-6690466-1,2,3 (Naval Sea Systems Command).
Key specifications for 6690466-1,2,3: Major Components: FAIRING 2,I SECTION 1; Special Features: FARIED MAST ASSY. 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 1240-01-381-0336 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.