NSN 6540-01-311-1090 P4.25 BC P1.75 ADD, P425BCP175ADD, 01-311-1090
Product Details | SEMIFINISHED BIFOCAL OPHTHALMIC LENS BLANK
6540-01-311-1090 A transparent optical element consisting of a major blank and a bifocal segment. The blank and segment have been pressed in a glass mold to an approximate size and shape, and are ground and polished to a finished diopter curvature on one surface only.
Part Alternates: P4.25 BC P1.75 ADD, P425BCP175ADD, 6540-01-311-1090, 01-311-1090, 6540013111090, 013111090
Medical, Dental, and Veterinary Equipment and Supplies | Ophthalmic Instruments, Equipment, and Supplies
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 65 | 19-NOV-89 | 01-311-1090 | 30300 ( LENS BLANK, OPHTHALMIC, BIFOCAL, SEMIFINISHED ) |
Drawings & Photos | NSN 6540-01-311-1090
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Technical Data | NSN 6540-01-311-1090
| Characteristic | Specifications |
|---|---|
| STYLE DESIGNATOR | A2 ROUND WITH STRAIGHT TOP BIFOCAL SEGMENT |
| DIAMETER | 66.0 MILLIMETERS NOMINAL |
| THICKNESS | 10.0 MILLIMETERS NOMINAL |
| READING SEGMENT DIAMETER | 25.0 MILLIMETERS NOMINAL |
| READING SEGMENT HEIGHT | 17.500 INCHES NOMINAL |
| MATERIAL AND LOCATION | PLASTIC OVERALL |
| LIGHT TRANSMISSION | UNTINTED |
| CROSS-SECTIONAL SHAPE STYLE | D2 SPHERE |
| BASE CURVE DIOPTER | 4.25 PLUS NOMINAL |
| CROSS CURVE DIOPTER | ANY ACCEPTABLE |
| SPHERE CURVE INSIDE DIOPTER | ANY ACCEPTABLE |
| SPHERE CURVE OUTSIDE DIOPTER | ANY ACCEPTABLE |
| ADDITIONAL POWER RATING IN DIOPTERS | 1.750 BIFOCAL |
| SPECIAL FEATURES | MATL CR-39; FLAT TOP; SEGMENT POSITIONED 5 MM BELOW AND 5 MM IN FROM GEOMETRIC CENTER FOR RIGHT AND LEFT LENSES,PLUS OR MINUS 2 MM |
Restrictions/Controls & Freight Information | NSN 6540-01-311-1090
| Category | Code | Description |
|---|---|---|
| Shelf-Life Code: | 0 | Nondeteriorative |
| Hazardous Material Indicator Code | N | There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials |
| Demilitarization Code: | A | Non-Munitions List Item/ Non-Strategic List Item - Demilitarization not required. |
| Controlled Inventory Item Code: | U | UNCLASSIFIED |
| Precious Metals Indicator Code: | A | Item does not contain precious metal |
| Criticality Code: | X | The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. |
| Category | Code | Description |
|---|---|---|
| No Freight Information | ||