The Lens,condensing, cataloged under National Stock Number 6540-01-643-3392, is classified within Federal Supply Class 6540 (Ophthalmic Instruments, Equipment, and Supplies) of the Medical, Dental, and Veterinary Equipment group. The manufacturer of record is Volk Optical Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 6540-01-643-3392 |
| Primary Part Number | V20LC |
| Item Name | Lens,condensing |
| FSC / FSG | 6540 / 65 — Ophthalmic Instruments, Equipment, and Supplies |
| Manufacturer | Volk Optical Inc |
| Status | ACTIVE |
| Carrying Case | PROVIDED |
| 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 |
| Part Number | Manufacturer |
|---|---|
| V20LC PRIMARY | Volk Optical Inc (USA) |
| Reference | Meaning |
|---|---|
| 6540CM151777 | 5/1 Secondary reference Defense Medical Standardization Board |
| 1291737 | 5/1 Secondary reference U.S. Government activity |
NSN 6540-01-643-3392 is a Lens,condensing, manufactured by Volk Optical Inc, classified under FSC 6540, Ophthalmic Instruments, Equipment, and Supplies. Status: active.
NSN 6540-01-643-3392 has 1 manufacturer part number on file: V20LC (Volk Optical Inc).
Key specifications for V20LC: Special Features: DOUBLE ASPHERIC GLASS OPTICS PROVIDE ENHANCED IMAGING; HIGH MAGNIFICATION FOR EXCELLENT VIEWS OF THE OPTIC DISC AND MACULA; PERFECTLY CORRECTED FOR FIELD CURVATURE, ASTIGMATISM, ABERRATIONS, AND COMA; FIELD OF VIEW: 46 DEG/60 DEG; IMAGE MAGNIFICATION: 3.13X; LASER SPOT: 0.32X; WORKING DISTANCE: 50 MM; LENS 20D; INCLUDES A SINGLE LENS CASE MM; Carrying Case: PROVIDED; Part Name Assigned by Controlling Agency: LENS CONDENSING 20D ASPHERIC. 1 specification is 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.