The Standard Ground Joint, Cone, Single is a precision-machined interchangeable glass connector designed for secure, leak-free assembly of laboratory glassware systems. It is widely used for connecting condensers, flasks, adapters, receivers, and other apparatus requiring accurate sealing. Its standardised conical grinding ensures compatibility, reliability, and safety in chemical syntheses, distillations, extractions, and general lab operations.

 Key Features

• Manufactured from high-quality Borosilicate Glass 3.3 for exceptional durability
• Precisely ground conical joint for tight, leak-proof connections
• Compliant with ISO 383 / DIN 12249 interchangeable joint standards
• Smooth, matte grinding surface for optimal sealing performance
• High chemical and thermal shock resistance
• Ensures secure and stable assembly of complex glassware setups
• Compatible with a wide range of laboratory components
• Designed for repeated use without wear on mating surfaces

Material Specifications

• Material: Borosilicate Glass 3.3

Thermal Properties:

• Low thermal expansion coefficient
• High resistance to rapid temperature changes
• Suitable for high-temperature operations

Chemical Resistance:

• Inert to most chemicals, solvents, acids, and reagents
• Non-reactive surface maintains the purity of samples

Mechanical Properties:

• Superior mechanical strength
• Precision grinding ensures long-term repeatability

Standards & Compliance:

• ISO 383
• DIN 12249
• International interchangeable joint norms

Technical Specifications

• Available Joint Sizes: Standard sizes such as 10/19, 14/23, 19/26, 24/29, 29/32, 34/35, 40/38, and others

Dimensions:

• Standard ISO/DIN joint angles and lengths
• Precision-controlled taper for perfect fit

Tolerance: Manufactured within strict dimensional tolerances for accurate interchangeability

Calibration: Not applicable (non-measuring glass component)

Packaging:

• Individually wrapped or bulk-packed in export-safe cartons
• Foam-lined or partitioned packaging for breakage prevention

Accessories (Optional):

• Joint clips
• Matching socket joints
• PTFE sleeves or lubricants

Handling & Precautions

• Handle carefully to avoid chipping or abrasion of the ground surface
• Clean using mild laboratory detergents; avoid abrasive materials
• Joints can be autoclaved and sterilised
• Follow borosilicate temperature guidelines
• Do not expose to sudden temperature extremes
• Use joint grease or PTFE sleeves when required to prevent sticking
• Inspect for cracks before assembly
• Store in dry racks or joint-protected trays

 Applications

• Chemical synthesis setups
• Fractional and simple distillation systems
• Organic chemistry and analytical laboratories
• Research and academic institutions
• Pharmaceutical QC/QA operations
• Biotech, chemical, and industrial R&D laboratories
• Anywhere requiring standardised, secure glassware connections
• Essential for building modular laboratory glassware assemblies

Why Choose MEDILAB

• 35+ years of expertise in scientific and laboratory glassware production
• Trusted by research institutions and industries in 40+ countries
• Manufactured using premium Borosilicate Glass 3.3 with global quality standards
• OEM / Private Labelling options available for distributors and brands
• Rigorous quality control ensures consistent, high-precision ground joints
• Robust export packaging for safe worldwide shipment
• Reliable supply chain and dedicated support for international buyers