Stopcock for Burette – Solid Plug

Precision-engineered solid plug stopcocks designed exclusively for laboratory burettes. Made from high-grade 3.3 borosilicate glass, these stopcocks provide a robust, leak-resistant seal for accurate titration work. The solid glass plug offers superior mechanical stability and a smooth, controlled flow — essential for precise drop-by-drop dispensing of reagents, acids, alkalis, and standard solutions.

Key Features

• Solid Glass Plug: Heavy-duty construction ensures durability and stable flow control during repetitive titrations.
• Precision Ground: Individually ground plug and barrel for a perfect, leak-proof seating without excessive grease.
• Borosilicate Glass: Excellent resistance to chemicals, acids, alkalis, and thermal shock.
• Smooth Operation: Effortless rotation for fine drop control at the endpoint of a titration.
• Interchangeable: Plug and barrel are numbered — never mix up, always fits its matching pair.
• Compatible: Fits standard burette barrels — easy replacement for broken or worn-out stopcocks.

Applications

• Glass burettes for acid-base titrations
• Redox titration assemblies
• Karl Fischer titration apparatus
• Educational chemistry laboratories
• Quality control and analytical labs

Technical Specifications

Available Options

Why Solid Plug for Burettes?

The solid plug design is preferred in burette applications because it provides a heavier, more stable feel during fine adjustments. Unlike hollow plugs, the solid construction resists accidental movement and offers better control when dispensing single drops near the titration endpoint. Combined with high-vacuum grease, it forms an absolutely leak-proof seal — critical for accurate volumetric analysis.

Need bulk quantities for educational labs or industrial use? Contact our sales team for discounted pricing.