The Eyeshield,optical Instrument, cataloged under National Stock Number 1240-00-026-8388, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 4 specifications, 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 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 | 1240-00-026-8388 |
| Primary Part Number | 687789 |
| Item Name | Eyeshield,optical Instrument |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Attachment End Inside Diameter | 2.200 INCHES IN |
| Viewing End Inside Diameter | 2.060 INCHES IN |
| Material | RUBBER |
| Attachment Method | PRESS FIT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 1240-00-026-8388 is a Eyeshield,optical Instrument, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-00-026-8388 has 2 manufacturer part numbers on file: 821841 (Lockheed Martin Corporation Div Rms - Mitchel Field), 687789 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
1 possible match (shared part number, not a government interchangeability claim): 1005-01-164-3191. Verify interchangeability with system specifications before substitution.
Key specifications for 687789: Attachment End Inside Diameter: 2.200 INCHES IN; Viewing End Inside Diameter: 2.060 INCHES IN; Material: RUBBER; Attachment Method: PRESS FIT. 4 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 1240-00-026-8388 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.