PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12-550Slide,microscope

Fisher Scientific Company L.l.c. · NSN 6640-00-494-3893 · FSC 6640 · No Item Name Available
Verified by PartsTable
NSN 6640-00-494-3893 — this item is cataloged by the U.S. Government under National Stock Number 6640-00-494-3893. Primary manufacturer part number: 12-550.
Features
  • Slide,microscope — FSC 6640
  • Overall Thickness: 0.75 MILLIMETERS MINIMUM AND 1.10 MILLIMETERS MAXIMUM MM
  • Material: GLASS
  • Supplementary Features: FOR USE IN CLINICAL MICROSCOPY AND HEMATOLOGY
  • Nondefinitive Spec/std Data: 1 TYPE AND 1 SIZE AND A THICKNESS
  • Departure From Cited Document: AS MODIFIED BY SIZE
  • Unit Package Type: BOX
  • Unit Package Quantity: 72
Applications
  • Applications requiring Glass construction
General Description

The Slide,microscope, cataloged under National Stock Number 6640-00-494-3893, is classified within Federal Supply Class 6640 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Fisher Scientific Company L.l.c.. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6640-00-494-3893
Primary Part Number12-550
Item NameSlide,microscope
FSC / FSG6640 / 66 — No Item Name Available
ManufacturerFisher Scientific Company L.l.c.
StatusACTIVE
Overall Thickness0.75 MILLIMETERS MINIMUM AND 1.10 MILLIMETERS MAXIMUM MM
MaterialGLASS
Supplementary FeaturesFOR USE IN CLINICAL MICROSCOPY AND HEMATOLOGY
Nondefinitive Spec/std Data1 TYPE AND 1 SIZE AND A THICKNESS
Departure From Cited DocumentAS MODIFIED BY SIZE
Unit Package TypeBOX
Unit Package Quantity72
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6640-00-074-41912752511 INTERCHANGEABLE
Slide,microscope
Azer Scientific Llc
5940-00-155-7029503-9873-002 INTERCHANGEABLE
Terminal Board
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
6640-00-247-6270 INTERCHANGEABLE
Slide,microscope
5325-00-276-777312550 INTERCHANGEABLE
Grommet,nonmetallic
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
2915-00-484-665312550 INTERCHANGEABLE
Collar
Triumph Engine Control Systems Llc
5850-00-501-1455 INTERCHANGEABLE
Light,signal
5940-00-629-7357341-120 INTERCHANGEABLE
Terminal,lug
Zierick Mfg Corp
4130-00-760-54977006 INTERCHANGEABLE
Charging Unit,refrigerant
Thermal Engineering Co a Div of Sea Kay Co Inc
3950-00-804-2716702-52098 INTERCHANGEABLE
Hub,idler
Control Flow, Inc. Dba Control Flow Inc
2930-01-047-18438125501 INTERCHANGEABLE
Pump,cooling System,engine
Am General Llc
Cross-Reference Index
Part NumberManufacturer
12-550 Fisher Scientific Company L.l.c. (USA)
NNNS00450 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
6640-00-074-4191INTERCHANGEABLE
SLIDE,MICROSCOPE
2752511
5940-00-155-7029INTERCHANGEABLE
TERMINAL BOARD
503-9873-002
6640-00-247-6270INTERCHANGEABLE
SLIDE,MICROSCOPE
5325-00-276-7773INTERCHANGEABLE
GROMMET,NONMETALLIC
12550
2915-00-484-6653INTERCHANGEABLE
COLLAR
12550
5850-00-501-1455INTERCHANGEABLE
LIGHT,SIGNAL
5940-00-629-7357INTERCHANGEABLE
TERMINAL,LUG
341-120
4130-00-760-5497INTERCHANGEABLE
CHARGING UNIT,REFRIGERANT
7006
3950-00-804-2716INTERCHANGEABLE
HUB,IDLER
702-52098
2930-01-047-1843INTERCHANGEABLE
PUMP,COOLING SYSTEM,ENGINE
8125501
5133-01-050-7936INTERCHANGEABLE
DRILL,TWIST
6685-01-076-8967INTERCHANGEABLE
BLACKBODY

Frequently Asked Questions

What is NSN 6640-00-494-3893?

NSN 6640-00-494-3893 is a Slide,microscope, manufactured by Fisher Scientific Company L.l.c., classified under FSC 6640 (No Item Name Available). Status: active.

What are the part numbers for NSN 6640-00-494-3893?

NSN 6640-00-494-3893 has 2 cross-referenced part numbers: 12-550 (Fisher Scientific Company L.l.c.), NNNS00450 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 6640-00-494-3893?

There are 12 known substitutes for 6640-00-494-3893: 6640-00-074-4191, 5940-00-155-7029, 6640-00-247-6270 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12-550?

Key specifications for 12-550: Overall Width: 25.0 MILLIMETERS NOMINAL MM; Overall Thickness: 0.75 MILLIMETERS MINIMUM AND 1.10 MILLIMETERS MAXIMUM MM; Material: GLASS; Overall Length: 75.0 MILLIMETERS NOMINAL MM. 10 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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