The Lens,ophthalmic,sphere, cataloged under National Stock Number 6540-00-001-0149, is classified within Federal Supply Class 6540 (No Item Name Available) of the Medical, Dental, and Veterinary Equipment group. The primary manufacturer of record is I F Optical Company Inc Dba Chicago Optical Co. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: PR.
| Parameter | Value |
|---|---|
| NSN | 6540-00-001-0149 |
| Primary Part Number | M425 |
| Item Name | Lens,ophthalmic,sphere |
| FSC / FSG | 6540 / 65 — No Item Name Available |
| Manufacturer | I F Optical Company Inc Dba Chicago Optical Co |
| Status | ACTIVE |
| Thickness | 1.6 MILLIMETERS NOMINAL MM |
| Diameter | 71.0 MILLIMETERS MINIMUM MM |
| Cubic Measure | 1.100 CUBIC FEET |
| Material | PLASTIC SINGLE VISION |
| Style Designator | ROUND |
| Supplementary Features | UNCUT |
| Departure From Cited Document | AS MODIFIED BY DIAMETER |
| Sphere Curve Inside Diopter | 4.25 MINUS MAXIMUM |
| Nondefinitive Spec/std Data | 1 STYLE AND A CLASS |
| Light Transmission | UNTINTED |
| Base Curve Diopter | 7.00 PLUS NOMINAL |
| Cross-Sectional Shape Style | SPHERE |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Unit of Issue | PR |
| Part Number | Manufacturer |
|---|---|
| M425 PRIMARY | I F Optical Company Inc Dba Chicago Optical Co (USA) |
| 0001201490 PRIMARY | Dispensers Optical Service Corp (USA) |
| LENS,M4.25SPH,2BC,71MM DIA | His Vision Inc (USA) |
NSN 6540-00-001-0149 is a Lens,ophthalmic,sphere, manufactured by I F Optical Company Inc Dba Chicago Optical Co, classified under FSC 6540 (No Item Name Available). Status: active.
NSN 6540-00-001-0149 has 3 cross-referenced part numbers: M425 (I F Optical Company Inc Dba Chicago Optical Co), 0001201490 (Dispensers Optical Service Corp), LENS,M4.25SPH,2BC,71MM DIA (His Vision Inc).
There are 7 known substitutes for 6540-00-001-0149: 5340-00-239-1000, 5310-00-010-2637, 4940-00-256-8864 and 4 more. Verify interchangeability with system specifications before substitution.
Key specifications for M425: Thickness: 1.6 MILLIMETERS NOMINAL MM; Diameter: 71.0 MILLIMETERS MINIMUM MM; Cubic Measure: 1.100 CUBIC FEET; Material: PLASTIC SINGLE VISION. 13 total characteristics are documented in the Federal Logistics Information System.