NSN 6540-01-717-8439, 6540017178439
BLOCKING UNIT,OPHTHALMIC LENS

Federal Supply Classification: FSC 6540 - Ophthalmic Instruments, Equipment, and Supplies
National Item Identification Number: NIIN 017178439
Codification Country: United States
Item Name Code: INC 20929
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 6540-01-717-8439

National Stock Number (NSN) 6540-01-717-8439, or NIIN 017178439, (blocking unit,ophthalmic lens) was assigned January 31, 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 3 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 one supplier. 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 not been procured by the US Government in over 5 years.

There has been very little 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) 20929. [AN ITEM CONSISTING OF A BLOCKER, DESIGNED TO CENTER AND AFFIX AN OPHTHALMIC LENS BLANK TO A PREPITCHED LENS BLOCK, AND A PREHEATING OVEN.]. 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 6540017178439 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 May 01, 2025.

Technical Characteristics

PART NAME ASSIGNED BY CONTROLLING AGENCY: (CXCY) 3 BX SEMI-AUTOMATIC LENS FINISH BLOCKER
SPECIAL FEATURES: (FEAT) 3 BX SEMI-AUTOMATIC LENS FINISH BLOCKER. UTILIZES IMAGERY PROTECTION TO DISPLAY LENS IMAGE OVER THE LCD LAYOUT SCREEN. BLOCKING OPTIONS: GEOMETRIC CENTER, OPTICAL CENTER OR MANUAL PLACEMENT. HEADS UP DISPLAY. CAN BE CONFIGURED TO ANY METAL OR PLASTIC BLOCK DESIGN.