The Lap,ophthalmic,cylindrical, cataloged under National Stock Number 6540-00-655-8640, is classified within Federal Supply Class 6540 (Ophthalmic Instruments, Equipment, and Supplies) of the Medical, Dental, and Veterinary Equipment group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 6540-00-655-8640 |
| Item Name | Lap,ophthalmic,cylindrical |
| FSC / FSG | 6540 / 65 — Ophthalmic Instruments, Equipment, and Supplies |
| Status | ACTIVE |
| Cross Curve in Diopters | 4.250 |
| Style Designator | CYLINDER, CONVEX |
| Finish Indicator | FINISHED |
| Material | IRON CAST OVERALL |
| Base Curve in Diopters | 3.250 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Unit of Issue | EA |
| Reference | Meaning |
|---|---|
| MILL36224 | 4/1 Identification reference U.S. Government activity |
NSN 6540-00-655-8640 is a Lap,ophthalmic,cylindrical, classified under FSC 6540, Ophthalmic Instruments, Equipment, and Supplies. Status: active.
Key specifications for 6540-00-655-8640: Cross Curve in Diopters: 4.250; Style Designator: CYLINDER, CONVEX; Finish Indicator: FINISHED; Special Features: FLAT-BACK BASE; CONVEX SURFACE TO GRIND CONCAVE. 5 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.