PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

421260Flask,boiling

Corning Glass Works · NSN 6640-00-279-2125 · FSC 6640 · No Item Name Available
Verified by PartsTable
NSN 6640-00-279-2125 — this item is cataloged by the U.S. Government under National Stock Number 6640-00-279-2125. Primary manufacturer part number: 421260.
Features
  • Flask,boiling — FSC 6640
  • Style Designator: VIAL ROUND BOTTOM
  • Closure Type Accommodated and Size Designation: 4 RUBBER STOPPER MOUTH
  • Total Primary Container Quantity: 1
  • Capacity Rating: 300.000 MILLILITERS NOMINAL
  • Nondefinitive Spec/std Data: 1 TYPE AND 2 CLASS AND 1 STYLE
  • Primary Container Type: CARTON
  • Primary Container Unit Quantity: 1
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Flask,boiling, cataloged under National Stock Number 6640-00-279-2125, is classified within Federal Supply Class 6640 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Corning Glass Works. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 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
NSN6640-00-279-2125
Primary Part Number421260
Item NameFlask,boiling
FSC / FSG6640 / 66 — No Item Name Available
ManufacturerCorning Glass Works
StatusACTIVE
Style DesignatorVIAL ROUND BOTTOM
Closure Type Accommodated and Size Designation4 RUBBER STOPPER MOUTH
Total Primary Container Quantity1
Capacity Rating300.000 MILLILITERS NOMINAL
Nondefinitive Spec/std Data1 TYPE AND 2 CLASS AND 1 STYLE
Primary Container TypeCARTON
Primary Container Unit Quantity1
Departure From Cited DocumentAS MODIFIED BY CAPACITY RATING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5950-00-133-88802500586 INTERCHANGEABLE
Reactor
Honeywell International Inc. Dba Honeywell International
5935-00-187-06982071 INTERCHANGEABLE
Connector,receptacle,electrical
Union Spring and Mfg Co
6640-00-264-833126600-500 INTERCHANGEABLE
Flask,erlenmeyer
Gerresheimer Glass Inc Div Gerresheimer Glass
6640-00-290-6944 INTERCHANGEABLE
Flask,filtering
5360-00-292-5066 INTERCHANGEABLE
Spring,helical,compression
2530-00-351-01384UG052 INTERCHANGEABLE
Brake Lining Kit
Volvo Trucks North America, Inc. Dba (foreign Parent Is Volvo Lastvagnar Ab, Goteborg, Sweden.)
6640-00-424-7100 INTERCHANGEABLE
Flask,erlenmeyer
5330-00-463-76094280 INTERCHANGEABLE
Retainer,seal
Eaton Corporation Dba Airframe Div Fuel & Motion Control Systems
6640-00-494-3854 INTERCHANGEABLE
Flask,filtering
6640-00-494-397035-6900-10 INTERCHANGEABLE
Flask,erlenmeyer
J & H Berge, Inc. Dba Lab Mart, the Div the Labmart
Cross-Reference Index
Part NumberManufacturer
NNNF00240 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
4280 Corning Glass Works (USA)
421260 PRIMARY Corning Glass Works (USA)
Related Parts
5950-00-133-8880INTERCHANGEABLE
REACTOR
2500586
5935-00-187-0698INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
2071
6640-00-264-8331INTERCHANGEABLE
FLASK,ERLENMEYER
26600-500
6640-00-290-6944INTERCHANGEABLE
FLASK,FILTERING
5360-00-292-5066INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
2530-00-351-0138INTERCHANGEABLE
BRAKE LINING KIT
4UG052
6640-00-424-7100INTERCHANGEABLE
FLASK,ERLENMEYER
5330-00-463-7609INTERCHANGEABLE
RETAINER,SEAL
4280
6640-00-494-3854INTERCHANGEABLE
FLASK,FILTERING
6640-00-494-3970INTERCHANGEABLE
FLASK,ERLENMEYER
35-6900-10
5985-00-583-0341INTERCHANGEABLE
COUPLER,DIRECTIONAL
4280
6640-00-935-4268INTERCHANGEABLE
FLASK,ERLENMEYER

Frequently Asked Questions

What is NSN 6640-00-279-2125?

NSN 6640-00-279-2125 is a Flask,boiling, manufactured by Corning Glass Works, classified under FSC 6640 (No Item Name Available). Status: active.

What are the part numbers for NSN 6640-00-279-2125?

NSN 6640-00-279-2125 has 3 cross-referenced part numbers: NNNF00240 (Federal Specifications Promulgated by General Services Administration Washington DC), 4280 (Corning Glass Works), 421260 (Corning Glass Works).

What NSN replaces 6640-00-279-2125?

There are 12 known substitutes for 6640-00-279-2125: 5950-00-133-8880, 5935-00-187-0698, 6640-00-264-8331 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 421260?

Key specifications for 421260: Style Designator: VIAL ROUND BOTTOM; Closure Type Accommodated and Size Designation: 4 RUBBER STOPPER MOUTH; Total Primary Container Quantity: 1; Capacity Rating: 300.000 MILLILITERS NOMINAL. 9 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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