The Glasses,visual Acuity Testing, cataloged under National Stock Number 6540-01-671-4394, 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.. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 6540-01-671-4394 |
| Primary Part Number | RA1SOSO010 |
| Item Name | Glasses,visual Acuity Testing |
| FSC / FSG | 6540 / 65 — Ophthalmic Instruments, Equipment, and Supplies |
| Manufacturer | Lombart Brothers, Inc. |
| Status | ACTIVE |
| Reference Number Differentiating Characteristics | COMPANY CAGE CODE 02012, STEREO OPTICAL IS THE OEM AND ONLY SELLS IN UNIT OF ISSUE OF PKG/5. THIS NSN IS PURCHASED BY THE DISTRIBUTOR WITH UNIT OF ISSUE OF 1. |
| 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 |
|---|---|
| RA1SOSO010 | Lombart Brothers, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 1502274 | 5/1 Secondary reference U.S. Government activity |
| 6540NCM184070 | 5/1 Secondary reference Defense Medical Standardization Board |
| RA1SOSO010 | 3/1 Design control — primary reference Stereo Optical Company, Inc |
NSN 6540-01-671-4394 is a Glasses,visual Acuity Testing, manufactured by Lombart Brothers, Inc., classified under FSC 6540, Ophthalmic Instruments, Equipment, and Supplies. Status: active.
NSN 6540-01-671-4394 has 1 manufacturer part number on file: RA1SOSO010 (Lombart Brothers, Inc.).
Key specifications for RA1SOSO010: Special Features: GLASSES POLARIZED FOR 3-D VIEWERS FOR USE IN STEREOPSIS, AMBLYOPIA, AND STRABISMUS TESTING. USED WITH END ITEM VISUAL ACUITY PROJECTOR 6540-01-577-1060.; Part Name Assigned by Controlling Agency: POLARIZED GLASSES FOR THE VISUAL ACUITY PROJECTOR; End Item Identification: 6540-01-577-1060; PROJECTOR, VISUAL ACUITY TEST; Reference Number Differentiating Characteristics: COMPANY CAGE CODE 02012, STEREO OPTICAL IS THE OEM AND ONLY SELLS IN UNIT OF ISSUE OF PKG/5. THIS NSN IS PURCHASED BY THE DISTRIBUTOR WITH UNIT OF ISSUE OF 1.. 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.