The Lens,ophthalmic,compound, cataloged under National Stock Number 6540-01-645-6112, 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 Allan Baker, Inc.. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: PR.
| Parameter | Value |
|---|---|
| NSN | 6540-01-645-6112 |
| Primary Part Number | POLY-ON-72MMSM175.025 |
| Item Name | Lens,ophthalmic,compound |
| FSC / FSG | 6540 / 65 — Ophthalmic Instruments, Equipment, and Supplies |
| Manufacturer | Allan Baker, Inc. |
| Status | ACTIVE |
| Diameter | 72.000 MILLIMETERS NOMINAL MM |
| Light Transmission | UNTINTED |
| 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 | PR |
| Part Number | Manufacturer |
|---|---|
| POLY-ON-72MMSM175.025 PRIMARY | Allan Baker, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 6540NCM151978 | 5/1 Secondary reference Defense Medical Standardization Board |
| 1338336 | 5/1 Secondary reference U.S. Government activity |
NSN 6540-01-645-6112 is a Lens,ophthalmic,compound, manufactured by Allan Baker, Inc., classified under FSC 6540, Ophthalmic Instruments, Equipment, and Supplies. Status: active.
NSN 6540-01-645-6112 has 1 manufacturer part number on file: POLY-ON-72MMSM175.025 (Allan Baker, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 6540-01-645-6122. Verify interchangeability with system specifications before substitution.
Key specifications for POLY-ON-72MMSM175.025: Diameter: 72.000 MILLIMETERS NOMINAL MM; Special Features: LENS; FINISHED SINGLE VISION; POLYCARBONATE; MINUS ON MINUS; DIAMETER OFLENS, 72MM; 175.025; MANUFACTURE (SOMO OPTICAL, LLC) DOES NOT HAVE A CAGE CODE MM; Light Transmission: UNTINTED; Part Name Assigned by Controlling Agency: LENS, FSV, POLY, - ON -, 72MM, 175.025 MM. 2 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.