Glass Screw Thread with Plastic Cap and Silicon Washer

The GISCOM Glass Screw Thread with Plastic Cap and Silicon Washer is a precision-engineered interchangeable glass component designed for secure, leak-proof connections in laboratory and industrial systems. Ideal for liquid transfer, sample storage, and chemical handling, it ensures safe sealing between glass joints. Its robust construction and chemical resistance make it indispensable for research labs, pharmaceutical production, quality control, and academic institutions.

Key Features

• High-precision GL-14 screw thread for tight and reliable connections.
• Leak-proof sealing system with durable plastic cap and chemical-resistant silicon washer.
• Manufactured from Borosilicate Glass 3.3, ensuring excellent thermal and chemical stability.
• Smooth, defect-free threads for effortless attachment and long service life.
• Inert and nonreactive to most laboratory chemicals, solvents, and reagents.
• Reusable, easy to clean, and suitable for repeated sterilisation.
• Universal compatibility with standard GL-threaded glassware used globally.

Material Specifications

• Material: Borosilicate Glass 3.3
• Thermal Properties: Very low thermal expansion coefficient (3.3 × 10⁻⁶ /K), High resistance to thermal shock Suitable for autoclaving and high-temperature use
• Chemical Properties: Resistant to acids, alkalis, solvents, and organic compounds. Non-porous, smooth surface prevents contamination
• Mechanical Properties: High mechanical strength and durability. Excellent clarity for easy visual inspection
• Standards: Conforms to ISO, DIN, and ASTM standards for laboratory borosilicate glass. Thread specifications based on standard GL-14 dimensions

Technical Specifications

• Thread Type: GL-14 (also available in additional GL sizes on request)
• Cap Material: High-quality chemically resistant plastic
• Washer Material: Premium silicone, providing secure sealing
• Tolerance: Precision-cut threads ensuring consistent fitment
• Temperature Range: –70°C to +500°C (glass component)
• Autoclavable: Yes, including cap and washer (up to 121°C)
• Accessories Included: Plastic cap, Silicon washer

Handling & Precautions

• Handle glass threads gently to avoid chipping or cross-threading.
• Always ensure the cap and washer are properly aligned before tightening.
• Wash using mild detergents; avoid abrasive cleaning tools.
• Suitable for autoclaving; ensure components are dry before sterilisation.
• Avoid rapid temperature changes to prevent thermal shock.
• Do not overtighten the cap; hand-tightening is sufficient.
• Replace the silicone washer periodically for optimal sealing performance.

 Applications

• Chemical Laboratories: Secure liquid transfer, reagent handling.
• Pharmaceutical Manufacturing: Aseptic processes, QC/QA workflows.
• Biotechnology & Life Sciences: Sample preparation, media storage.
• Academic & Research Institutions: General lab use and experimental setups.
• Industrial R&D: Pilot plant setups and analytical procedures.
• Environmental Testing Labs: Water, soil, and solvent analysis setups.

Used widely in glass assemblies, condensers, adapters, reaction vessels, and other GL-threaded apparatus.