NSN 6540-01-719-7739, 6540017197739
LIGHT,SLIT,OPHTHALMIC

Federal Supply Classification: FSC 6540 - Ophthalmic Instruments, Equipment, and Supplies
National Item Identification Number: NIIN 017197739
Codification Country: United States
Item Name Code: INC 34764
Criticality: (X) This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Hazardous Material Indicator Code: (N) There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials.

Availability: Readily Available Qualified Suppliers: Currently qualifying suppliers

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DLMS^® Summary

National Stock Number 6540-01-719-7739

National Stock Number (NSN) 6540-01-719-7739, or NIIN 017197739, (light,slit,ophthalmic) was assigned April 25, 2024 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There are 4 manufacturer part numbers associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, one supplier is listed as an Active supplier for this NSN. Of the active suppliers, only one supplier is deemed design controlled or valid supply parts.

This part number has been procured by the US Government within the last year, but shows no recent (last 90 days) procurement activity. There have been 6 contracts issued for this part number, with 5 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 3 different suppliers. The last contract numbers awarded were: SPE2DS25V6785, SPE2DS25P0372, SPE2DS25P0372, SPE2DS25P0396, SPE2DS24V141P. The total value of the awarded contracts has been US$ 29,604.86.

There has been a small amount of demand for this national stock number. The demand for this NSN originated from less than 5 countries.

This NSN is assigned to Item Name Code (INC) 34764. [AN ITEM WHICH CONSISTS OF AN ILLUMINATING UNIT AND A BINOCULAR MAGNIFIER OR MICROSCOPE. DESIGNED TO PERMIT INDEPENDENT MANIPULATION OF EITHER UNIT, SO THAT THE ANTERIOR SEGMENT OF A LIVING EYE CAN BE EXAMINED.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 6540017197739 does not contain precious metals.

This NSN is associated to Schedule B 9018500000: other ophthalmic instruments and appliances and parts and accessories. The Schedule B End Use is listed as medicinal equipment. NAICS classification category 339112: surgical and medical instrument manufacturing.

This information was last updated on Aug 01, 2025.

Technical Characteristics

PART NAME ASSIGNED BY CONTROLLING AGENCY: (CXCY) HAND-HELD SLIT LAMP
MOUNTING METHOD: (AXGY) FREE STANDING BASE
SPECIAL FEATURES: (FEAT) SLIT LAMP IS A NON-INVASIVE DEVICE THAT IS ABLE TO ILLUMINATION, MAGNIFICATION AND OBSERVATION THE HUMAN EYE; MAGNIFICATION 10X AND 16X; 3 X AA NI-MH BATTERIES. OPHTHALMIC DIAGNOSTIC INSTRUMENTS DESIGNED FOR EXAMINING THE EYE (MOSTLY THE ANTERIOR PART OF THE EYE) USING AN ILLUMINATION SYSTEM COMBINED WITH A BINOCULAR MICROSCOPE. THE INSTRUMENTS USUALLY CONSIST OF ILLUMINATION SOURCES WITH A MECHANISM THAT PROVIDES A SLIT BEAM OF LIGHT INTO THE EYE WITH DIFFERENT TYPES OF ILLUMINATION (E.G., DIRECT OR INDIRECT, FOCAL OR DIFFUSE, BACKGROUND ILLUMINATION), A BINOCULAR MICROSCOPE FOR VIEWING THE MAGNIFIED SLIT IMAGE, AND A CONTROL COMPONENT FOR ADJUSTING THE FOCUS OF THE MICROSCOPE AND THE SLIT (E.G., SLIT ROTATION, SLIT WIDTH); SOME ALSO HAVE REFRACTION MIRRORS TO DIRECT LIGHT TO A CAMERA MOUNTED ABOVE THE MICROSCOPE. SLIT LAMPS PROVIDE A MAGNIFIED VIEW OF EYE STRUCTURES (E.G., EYELID, SCLERA, IRIS, CRYSTALLINE LENS, CORNEA).
VOLTAGE RATING IN VOLTS: (ASXH) 3.0 DC MINIMUM AND 4.8 DC MAXIMUM