The Eyeshield,optical Instrument, cataloged under National Stock Number 1240-01-557-7975, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Nivisys, Llc. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1240-01-557-7975 |
| Primary Part Number | A3144422 |
| Item Name | Eyeshield,optical Instrument |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Nivisys, Llc |
| Status | ACTIVE |
| Attachment End Inside Diameter | 1.700 INCHES IN |
| Viewing End Inside Diameter | 2.178 INCHES IN |
| Material | RUBBER |
| 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 |
|---|---|
| A3144422 PRIMARY | Nivisys, Llc (USA) |
| Reference | Meaning |
|---|---|
| A3144422 | 3/9 Design control — primary reference Nivisys Industries, Llc |
NSN 1240-01-557-7975 is a Eyeshield,optical Instrument, manufactured by Nivisys, Llc, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-557-7975 has 1 manufacturer part number on file: A3144422 (Nivisys, Llc).
Key specifications for A3144422: Overall Length: 2.139 INCHES NOMINAL IN; Attachment End Inside Diameter: 1.700 INCHES IN; Viewing End Inside Diameter: 2.178 INCHES IN; End Item Identification: TAM-14 MOD 7 THERMAL ACQUISITION MONOCULAR. 3 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 1240-01-557-7975 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.