The Fairing,periscope, cataloged under National Stock Number 1240-01-284-4374, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Huntington Ingalls Inc Div Newport News Shipbuilding. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Fairing,periscope |
| FSC / FSG | 1240 — Optical Sighting and Ranging Equipment (FSG 12) |
| Manufacturers | Huntington Ingalls Inc Div Newport News Shipbuilding (CAGE 43689); Naval Sea Systems Command (CAGE 53711) |
| Parameter | Value |
|---|---|
| NSN | 1240-01-284-4374 |
| Primary Part Number | 400-6015780 AY98 |
| Item Name | Fairing,periscope |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Huntington Ingalls Inc Div Newport News Shipbuilding |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 2070-133 ASSY 98 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 400-6015780 AY98 PRIMARY | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 6744237-01 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| F5120101 | 5/9 Secondary reference Naval Ship Engineering Center Philadelphia Division Submarine Antenna Quality Assurance |
NSN 1240-01-284-4374 is a Fairing,periscope, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-284-4374 has 3 manufacturer part numbers on file: 2070-133 ASSY 98 (Huntington Ingalls Inc Div Newport News Shipbuilding), 400-6015780 AY98 (Huntington Ingalls Inc Div Newport News Shipbuilding), 6744237-01 (Naval Sea Systems Command).
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.