The Periscope Subassembly, cataloged under National Stock Number 1240-01-398-5449, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1240-01-398-5449 |
| Primary Part Number | 400-6690465 ITEM 1TR |
| Item Name | Periscope Subassembly |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | SELECTED TESTED AND CERTIFIED FOR TRIDENT SUBMARINE APPLICATION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 400-6690465 ITEM 1TR | Naval Inventory Control Point Mechanicsburg (USA) |
| 6690465-0001TR | Naval Inventory Control Point Mechanicsburg (USA) |
| 6690465 ITEM 1TR | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 6690465 ITEM 1 | 5/1 Secondary reference Naval Sea Systems Command |
| 400-6690465 ITEM 1 | 3/1 Design control — primary reference Naval Sea Systems Command |
| 6690465-0001 | 5/1 Secondary reference U.S. Government activity |
NSN 1240-01-398-5449 is a Periscope Subassembly, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-398-5449 has 3 manufacturer part numbers on file: 400-6690465 ITEM 1TR (Naval Inventory Control Point Mechanicsburg), 6690465-0001TR (Naval Inventory Control Point Mechanicsburg), 6690465 ITEM 1TR (Naval Inventory Control Point Mechanicsburg).
Key specifications for 400-6690465 ITEM 1TR: Criticality Code Justification: ZZZY; Special Features: PERISCOPE FAIRING; Reference Number Differentiating Characteristics: SELECTED TESTED AND CERTIFIED FOR TRIDENT SUBMARINE APPLICATION. 2 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 1240-01-398-5449 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.