Product Overview
European-Style Three-Neck Flask, 125 mL, Two ST 14/20 Sockets and a Threaded Port
Condition
Unused new old stock in excellent condition, in the original manufacturer's packaging. The unit pictured is representative of stock. Markings legible on the glass: ST 14/20, Kontes, 125mL. The threaded port carries a blue open-top screw cap with an O-ring.
Ships from our Idaho warehouse the same or next business day. We've been selling online since 1999.
Product Overview
A 125 mL reaction flask in the European style: a wide, flat-bottomed body that tapers up to three necks. Two necks carry ST 14/20 ground glass sockets for a condenser, addition funnel or stopper. The third is a threaded side port closed by an open-top screw cap with an O-ring, where a thermometer or probe can pass through.
Key Features
- Marked capacity: 125 mL
- Two ST 14/20 ground glass sockets
- One threaded side port with blue open-top screw cap and O-ring
- Tube opening in the threaded neck: 0.28 inch
- Tapered walls and a shallow bottom
- Flat base that stands upright on a bench or stir plate without a ring
- Red Kontes markings on the glass and a white marking spot for labeling
Applications
- Small-scale synthesis with a condenser on one neck, an addition funnel on the other and a thermometer through the threaded port
- Stirred reactions on a magnetic stir plate, with no cork ring needed
- Teaching labs working at 14/20 scale
Frequently Asked Questions
What joint size are the ground necks?
ST 14/20 on both, as marked on the glass.
What is the threaded port for?
The open-top cap and O-ring let a thermometer, probe or tube pass through and seal around it.
Why this flask instead of a round-bottom three-neck?
The flat base stands up by itself and sits directly on a stir plate, with the same three working necks. Flat-rate shipping in the lower 48, and orders over the free-shipping line ship free.
Three necks means three jobs at once: something going in, something cooling, something being measured. Give it a stir bar and a plan.
