The Filter,light,optical Instrument, cataloged under National Stock Number 1240-01-497-5478, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Mbm Industries Ltd. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1240-01-497-5478 |
| Primary Part Number | 887C051881 |
| Item Name | Filter,light,optical Instrument |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Mbm Industries Ltd |
| Status | ACTIVE |
| Overall Diameter | 0.985 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN |
| Overall Thickness | 0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN |
| Density Variability | NOT VARIABLE |
| Material | GLASS SURFACE |
| 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 |
|---|---|
| 887C051881 PRIMARY | Mbm Industries Ltd (USA) |
| Reference | Meaning |
|---|---|
| 887C051881 | 5/9 Secondary reference L3 Technologies, Inc. Div L3 Keo |
NSN 1240-01-497-5478 is a Filter,light,optical Instrument, manufactured by Mbm Industries Ltd, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-497-5478 has 1 manufacturer part number on file: 887C051881 (Mbm Industries Ltd).
Key specifications for 887C051881: Overall Diameter: 0.985 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN; Overall Thickness: 0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN; Special Features: FILTER HAS A CEMENTED INTERFACE WITH VACUUM DEPOSITED INCONEL.; Part Name Assigned by Controlling Agency: FILTER,SUN. 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.
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.