The Microscope,optical, cataloged under National Stock Number 6650-00-490-2709, is classified within Federal Supply Class 6650 (Optical Instruments, Test Equipment, Components and Accessories) of the Instruments and Laboratory Equipment group. The manufacturer of record is Bausch & Lomb Inc. Government technical data includes 30 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6650-00-490-2709 |
| Primary Part Number | 31-28-51-54 |
| Item Name | Microscope,optical |
| FSC / FSG | 6650 / 66 — Optical Instruments, Test Equipment, Components and Accessories |
| Manufacturer | Bausch & Lomb Inc |
| Status | ACTIVE |
| Stage Type | REVOLVING AND MECHANICAL |
| Mirror Quantity | 2 |
| Nosepiece Design | TURRET |
| Body Tube Bertrand Lens | NOT PROVIDED |
| Magnification | 4.0X NOMINAL AND 10.0X NOMINAL AND 21.0X NOMINAL |
| Numeric Aperture | 1.25 |
| Usage Design | CHEMISTRY |
| Lens Type | ACHROMATIC |
| Stage Calibration Facility | GRADUATED PERIPHERY AND GRADUATED SCALE |
| Centering Feature | PROVIDED |
| Body Tube Accessroy Slot | PROVIDED |
| Eyepiece Magnification | 5 AND 7.5 AND 10 AND 12.5 |
| Focusing Type | FIXED |
| Eyepiece Quantity | 4 |
| Diameter | 125.0 MILLIMETERS NOMINAL MM |
| Objective Iris Diaphragm | NOT PROVIDED |
| Mounted Cross Hairs | PROVIDED |
| Accessory Components and Quantity | PLATE,QUARTER WAVE 1,PLATE,SELENITE 1,WEDGE,QUARTZ 1 |
| Body Tube Position | VERTICAL |
| Polarizer | PROVIDED |
| Mirror Surface Contour | CONCAVE AND PLANE |
| Iris Diaphragm Type | CENTERABLE |
| Disc Insert Usage Design | NOT PROVIDED |
| Objective Type | DRY |
| Nonstereoscopic Type | MONOCULAR |
| Funnel Stop Design Feature | NOT PROVIDED |
| Eyepiece Designator | HUYGENIAN |
| Stage Shape | CIRCULAR |
| Lens Coating Feature | UNCOATED |
| Carrying Case | PROVIDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 31-28-51-54 PRIMARY | Bausch & Lomb Inc (USA) |
NSN 6650-00-490-2709 is a Microscope,optical, manufactured by Bausch & Lomb Inc, classified under FSC 6650, Optical Instruments, Test Equipment, Components and Accessories. Status: active.
NSN 6650-00-490-2709 has 1 manufacturer part number on file: 31-28-51-54 (Bausch & Lomb Inc).
Key specifications for 31-28-51-54: Stage Type: REVOLVING AND MECHANICAL; Mirror Quantity: 2; Nosepiece Design: TURRET; Body Tube Bertrand Lens: NOT PROVIDED. 30 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.