Specifications

Straight Connector · Specifications

The following are general specifications. For custom sizes or special structures, please contact our sales team.

1. Joint Sizes

Joint Size	Max Inner Diameter (mm)	Joint Length (mm)	Joint Type Options
Please contact us to confirm the available specifications.

* Both DIN (EU) and ASTM standards use 1:10 taper and are mutually compatible.
* Same joint size can be ordered with different joint types.
* Max inner diameter is the diameter at the top of the joint.

2. Dimensions (Typical Values)

Joint Size	Distance Between Joints (mm)	Overall Length (mm) approx.	Joint Type	Material
Please contact us to confirm the available specifications.

* Dimensions are approximate.
* Distance between joints can be customized.
* Custom joint sizes and lengths available upon request.

Product Description

The straight connector is one of the most fundamental connecting adapters in standard joint glassware, used for extending apparatus length or connecting two components with the same joint size. Both ends feature identical standard taper joints. Manufactured from borosilicate glass 3.3, it meets ASTM E438 Type I Class A standards.

Joint Types

Inner/Inner: Both ends are inner joints (female) — receives outer joint components
Outer/Outer: Both ends are outer joints (male) — fits into inner joint components
Outer/Inner: One outer joint and one inner joint — connects different joint types

Key Features

Borosilicate Glass 3.3: ISO 3585 compliant, low expansion, thermal shock 280°C
Standard Joint: 1:10 taper, precision ground for reliable sealing
Three Types: Inner/Inner, Outer/Outer, Outer/Inner for different connection needs
Multiple Sizes: 10/19 ~ 24/40 full range, DIN and ASTM compatible
Multiple Lengths: 30mm ~ 130mm distance between joints
High Transparency: Easy observation of connection status
Chemical Resistant: Suitable for various organic solvents
Air Condenser Compatible: Some models can serve as air condensers

Quality Assurance

Every straight connector undergoes strict dimensional inspection, joint taper testing, and thermal resistance testing to ensure compliance with applicable standards.

Note: Ensure joints are clean and dry before use to prevent sticking. Insert with gentle twisting motion, do not force. Use accessories of the same joint size for optimal sealing. When using as an air condenser, ensure adequate length and proper sealing.

Applications

Typical Applications

Distillation Apparatus Extension

Increase distance between distillation head and condenser

Reflux Apparatus Connection

Connect flask and condenser, increase apparatus height

Joint Type Conversion

Connect components with different joint types (Outer/Inner type)

Air Condensation

Some models can serve as air condensers

Organic Synthesis

Various apparatus assembly and connections

Education

University chemistry lab teaching

Typical Apparatus Assembly

Flask (outer) → Straight Connector (Inner/Inner) → Condenser (outer)

Flask (outer) → Straight Connector (Outer/Inner) → Distillation Head (inner)

Condenser (outer) → Straight Connector (Outer/Outer) → Vacuum Adapter (inner)

Tip: The straight connector is the most fundamental connecting adapter in standard joint glassware. Use accessories of the same joint size for optimal sealing. For connecting different joint sizes, use a reducing adapter.

Straight Connector · Selection Guide

Select the right straight connector based on your connection needs:

📏 Apparatus Extension

For increasing apparatus height or extending vapor path length.

Recommended: Outer/Inner · 24/40 · 100mm distance

🔗 Connect Two Outer Joints

Both components have outer joints (male) that need to be connected.

Recommended: Inner/Inner · Match component joint size

🔗 Connect Two Inner Joints

Both components have inner joints (female) that need to be connected.

Recommended: Outer/Outer · Match component joint size

🔗 Connect Inner & Outer Joints

One component has an outer joint, the other has an inner joint.

Recommended: Outer/Inner · Match component joint size

🌬️ Air Condenser Use

For use as an air condenser to cool low-boiling solvents.

Recommended: Outer/Inner · 24/40 · ≥ 100mm distance

Selection Tip: First identify the joint types of the components to be connected (inner or outer), then select the corresponding straight connector type. For apparatus extension, the Outer/Inner type is recommended. Contact our technical team for assistance.

Operation & Maintenance

User Guide

Preparation

Inspect connector for cracks, chips, or scratched joints
Clean joint surfaces with a soft cloth or cotton swab
Apply a small amount of vacuum grease if joints are too tight

Installation & Connection

Confirm both joint sizes match the components to be connected
Insert or fit one end with gentle twisting motion
Connect the other end to the next component
Insert with gentle twisting motion, do not force
Secure components with clamps for stability

Operation Notes

Check all joints for proper sealing after connection
When using as an air condenser, ensure vertical installation
Consider weight load on the connector — avoid overloading

Disassembly & Cleaning

Gently twist to detach components
Clean immediately after use to prevent residue buildup
Wash joints with soft brush and detergent, avoid hard objects
Air dry after washing, store with soft paper between joints

Care & Notes

Show care & notes

Safety Tips

Watch temperature gradients during heating
Always work in a fume hood when handling hazardous chemicals

Do not

Do not use cracked or chipped connectors for experiments
Align components properly during connection to avoid stress