The Lens Blank,ophthalmic,sphere,sem, cataloged under National Stock Number 6540-01-273-8621, 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 Gerber Coburn Optical Industries Inc. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: PR.
| Parameter | Value |
|---|---|
| NSN | 6540-01-273-8621 |
| Primary Part Number | P4.25 |
| Item Name | Lens Blank,ophthalmic,sphere,sem |
| FSC / FSG | 6540 / 65 — No Item Name Available |
| Manufacturer | Gerber Coburn Optical Industries Inc |
| Status | ACTIVE |
| Diameter | 71.0 MILLIMETERS NOMINAL MM |
| Sphere Curve Inside Diopter | 4.25 PLUS NOMINAL |
| Height | 71.0 MILLIMETERS NOMINAL MM |
| Style Designator | ROUND-RECTANGULAR WITH ROUNDED CORNERS |
| Light Transmission | UNTINTED |
| Material | GLASS SODA-LIME SINGLE VISION |
| Width | 71.0 MILLIMETERS NOMINAL MM |
| Cross-Sectional Shape Style | SPHERE |
| Thickness | 2.2 MILLIMETERS NOMINAL MM |
| Acquisition Status | ACTIVE |
| Successor | 6515-01-275-3998 (9033504) |
| HAZMAT | No |
| Unit of Issue | PR |
| Part Number | Manufacturer |
|---|---|
| P4.25 | Gerber Coburn Optical Industries Inc (USA) |
NSN 6540-01-273-8621 is a Lens Blank,ophthalmic,sphere,sem, manufactured by Gerber Coburn Optical Industries Inc, classified under FSC 6540 (No Item Name Available). Status: active.
NSN 6540-01-273-8621 has 1 cross-referenced part number: P4.25 (Gerber Coburn Optical Industries Inc).
There are 3 known substitutes for 6540-01-273-8621: 6515-01-275-3998, 1730-00-312-2687, 6520-01-124-9790. Verify interchangeability with system specifications before substitution.
Key specifications for P4.25: Diameter: 71.0 MILLIMETERS NOMINAL MM; Sphere Curve Inside Diopter: 4.25 PLUS NOMINAL; Special Features: UNCUT; Height: 71.0 MILLIMETERS NOMINAL MM. 11 total characteristics are documented in the Federal Logistics Information System.