PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

RT-7691Holder Assembly Card,phoropter

Lombart Brothers, Inc Dba Marco Lombart Div Marco Lombart · NSN 6540-01-549-7674 · FSC 6540 · No Item Name Available
Verified by PartsTable
NSN 6540-01-549-7674 — this item is cataloged by the U.S. Government under National Stock Number 6540-01-549-7674. Primary manufacturer part number: RT-7691.
Features
  • Holder Assembly Card,phoropter — FSC 6540
  • 3 verified cross-references
  • Primary manufacturer: Lombart Brothers, Inc Dba Marco Lombart Div Marco Lombart
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Holder Assembly Card,phoropter, cataloged under National Stock Number 6540-01-549-7674, 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 Lombart Brothers, Inc Dba Marco Lombart Div Marco Lombart. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6540-01-549-7674
Primary Part NumberRT-7691
Item NameHolder Assembly Card,phoropter
FSC / FSG6540 / 65 — No Item Name Available
ManufacturerLombart Brothers, Inc Dba Marco Lombart Div Marco Lombart
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 11
5905-00-104-9919B5J12R INTERCHANGEABLE
Resistor,fixed,wire Wound
Ohmite Holding, L.l.c. Dba Ohmite Manufacturing
5330-00-216-93682848 INTERCHANGEABLE
Seal Assembly
Northrop Grumman Systems Corporation Div Marine Systems
5820-00-340-3652SC-C-65240 INTERCHANGEABLE
Adapter Assembly,contact
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5360-00-664-5330 INTERCHANGEABLE
Spring,helical,compression
2530-00-846-9345336-P INTERCHANGEABLE
Parts Kit,hydraulic Brake Master
Motive Parts Co of America Inc
5330-00-971-80852848 INTERCHANGEABLE
Seal,plain Encased
Parker Hannifin Corporation Div Chelsea Products Division
4730-01-157-137310513109 INTERCHANGEABLE
Clamp,hose
General Dynamics Land Systems Canadacorp
3120-01-246-0595 INTERCHANGEABLE
Bearing,sleeve
5935-01-440-17502848 INTERCHANGEABLE
Connector,plug,electrical
Atlas Metal Industries Inc
5305-01-503-745728-48 INTERCHANGEABLE
Screw,cap,hexagon Head
Crane Carrier Company, Llc
Cross-Reference Index
Part NumberManufacturer
RT-7691 PRIMARY Lombart Brothers, Inc Dba Marco Lombart Div Marco Lombart (USA)
6540NCM071196 Defense Medical Standardization Board (USA)
2848 Defense Logistics Agency Directorate of Medical Materiel Defense Supply Center Philadelphia (USA)
Related Parts
5905-00-104-9919INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND
B5J12R
5330-00-216-9368INTERCHANGEABLE
SEAL ASSEMBLY
2848
5820-00-340-3652INTERCHANGEABLE
ADAPTER ASSEMBLY,CONTACT
SC-C-65240
5360-00-664-5330INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
2530-00-846-9345INTERCHANGEABLE
PARTS KIT,HYDRAULIC BRAKE MASTER
336-P
5330-00-971-8085INTERCHANGEABLE
SEAL,PLAIN ENCASED
2848
4730-01-157-1373INTERCHANGEABLE
CLAMP,HOSE
10513109
3120-01-246-0595INTERCHANGEABLE
BEARING,SLEEVE
5935-01-440-1750INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
2848
5305-01-503-7457INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
28-48
5820-01-617-9719INTERCHANGEABLE
BEACON,DISTRESS
2848

Frequently Asked Questions

What is NSN 6540-01-549-7674?

NSN 6540-01-549-7674 is a Holder Assembly Card,phoropter, manufactured by Lombart Brothers, Inc Dba Marco Lombart Div Marco Lombart, classified under FSC 6540 (No Item Name Available). Status: active.

What are the part numbers for NSN 6540-01-549-7674?

NSN 6540-01-549-7674 has 3 cross-referenced part numbers: RT-7691 (Lombart Brothers, Inc Dba Marco Lombart Div Marco Lombart), 6540NCM071196 (Defense Medical Standardization Board), 2848 (Defense Logistics Agency Directorate of Medical Materiel Defense Supply Center Philadelphia).

What NSN replaces 6540-01-549-7674?

There are 11 known substitutes for 6540-01-549-7674: 5905-00-104-9919, 5330-00-216-9368, 5820-00-340-3652 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of RT-7691?

Key specifications for RT-7691: Part Name Assigned by Controlling Agency: HOLDER ASSY. CARD FOR THE PHOROPTER MINUS CYLINDRICAL LENS; Special Features: HOLDER ASSY. CARD FOR THE PHOROPTER MINUS CYLINDRICAL LENS TYPE END ITEM NSN 6540-00-877-6464. FOUND IN ARMY UNIT ASSEMBLAGE N315, MEDICAL MATERIEL SET EYE EXAM CLINIC: DEPMEDS; End Item Identification: PHOROPTER, 6540-00-877-6464. 3 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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