The Refractor and Keratometer,automa, cataloged under National Stock Number 6540-01-524-8413, 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 Lombart Brothers, Inc Dba Marco Lombart Div Marco Lombart. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 6540-01-524-8413 |
| Primary Part Number | ARK-1A |
| Item Name | Refractor and Keratometer,automa |
| FSC / FSG | 6540 / 65 — Ophthalmic Instruments, Equipment, and Supplies |
| Manufacturer | Lombart Brothers, Inc Dba Marco Lombart Div Marco Lombart |
| Status | ACTIVE |
| 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 |
|---|---|
| ARK-1A PRIMARY | Lombart Brothers, Inc Dba Marco Lombart Div Marco Lombart (USA) |
| Reference | Meaning |
|---|---|
| 04-1426 | 5/1 Secondary reference U.S. Government activity |
| 6540NCM041202 | 5/1 Secondary reference Defense Medical Standardization Board |
| ARK-730A | 5/9 Secondary reference Lombart Brothers, Inc Dba Marco Lombart Div Marco Lombart |
NSN 6540-01-524-8413 is a Refractor and Keratometer,automa, manufactured by Lombart Brothers, Inc Dba Marco Lombart Div Marco Lombart, classified under FSC 6540, Ophthalmic Instruments, Equipment, and Supplies. Status: active.
NSN 6540-01-524-8413 has 1 manufacturer part number on file: ARK-1A (Lombart Brothers, Inc Dba Marco Lombart Div Marco Lombart).
Key specifications for ARK-1A: Special Features: POWER SOURCE AC 100/120 V; 50/60 HZ; DIMENSIONS: 10.24 IN. WIDE BY 19.09 IN. DIAMETER BY 17.83 IN. HIGH; 5 INCH MONOCHROME CRT MONITOR; AUTO TRACKING; ALIGNMENT DIRECTION UP, DOWN, RIGHT, AND LEFT; AUTO SHOOT, PROPER ALIGNMENT TRIGGERS MEASUREMENT; HIGH SPEED PRINTER, THERMO-SENSITIVE LINE; EXTERNAL ENTERFACE: RS-232X SERIAL STANDARD; PERFORMS KERATOMETERY READING SIMULTANEOULSY; FEATURES AUTOMATIC ALIGNMENT, FOCUSING AND READING; INCLUDES: SPARE FUSES, SPARE ROLLS OF PRINTER PAPER, DUST COVER, CHIN REST PAPER, AND POWER SUPPLY V; Part Name Assigned by Controlling Agency: REFRACTOR KERATOMETER AUTO. 0 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.