Description
The Unprinted Glass Socket Joints from Osmosis Scientific are foundational components for custom glassware assembly and technical laboratory setups. These female ground-glass joints are manufactured from premium Boro 3.3 borosilicate glass, chosen for its excellent chemical durability and low coefficient of thermal expansion. The unprinted finish is specifically preferred by glassblowers and technicians who require a clean, marking-free surface for seamless welding and clear visibility.
Each socket is precision-ground to a 1:10 taper, ensuring full compatibility with any standard cone joint meeting DIN/ISO specifications. This precision ensures a secure, leak-proof seal that is essential for vacuum distillations, reflux setups, and gas-tight reactions. The robust wall thickness provides the mechanical strength needed to withstand the stresses of assembly and the high-vacuum pressures often encountered in analytical research.
Available in a wide array of international standard sizes—from the small 10/19 to the larger 45/40 variants—these joints offer universal interchangeability. Their superior thermal properties allow them to be integrated into apparatus that undergoes intense heating and cooling cycles without risking structural failure.
| Socket Size | Approx. O.D. of Tube (mm) | Total Length (mm) | Pack of | SKU | Enquiry |
|---|---|---|---|---|---|
| 10/19 | 13 | 120±10 | 10 | JSD-10_19 | Enquire Now |
| 12/21 | 16 | 120±10 | 10 | JSD-12_21 | Enquire Now |
| 14/23 | 18 | 120±10 | 10 | JSD-14_23 | Enquire Now |
| 19/26 | 22 | 125±10 | 10 | JSD-19_26 | Enquire Now |
| 24/29 | 28 | 135±10 | 10 | JSD-24_29 | Enquire Now |
| 29/32 | 32 | 135±10 | 10 | JSD-29_32 | Enquire Now |
| 34/35 | 38 | 150±10 | 10 | JSD-34_35 | Enquire Now |
| 40/38 | 45 | 150±10 | 10 | JSD-40_38 | Enquire Now |
| 45/40 | 50 | 150±10 | 10 | JSD-45_40 | Enquire Now |
| 50/42 | 55 | 150±10 | 10 | JSD-50_42 | Enquire Now |
| 55/44 | 60 | 150±10 | 10 | JSD-55_44 | Enquire Now |
Frequently Asked Questions (FAQs)
These joints are manufactured to meet:
- ISO 383: International standard for interchangeable conical ground joints.
- DIN 12242: The German standard for laboratory glassware joints.
The internal surface is precision-ground to a matte finish. When mated with a corresponding cone, the 1:10 taper ensures maximum surface contact. Using a small amount of vacuum grease or a PTFE sleeve creates a seal capable of maintaining high-vacuum conditions.
“Freezing” occurs when ground glass surfaces seize together. To prevent this:
- Use a light coating of silicone or vacuum grease.
- Utilize PTFE (Teflon) sleeves for grease-free connections.
- Always disconnect and clean joints immediately after use, especially when working with caustic or “sticky” reagents.
Yes, DIN/ISO unprinted socket joints are suitable for vacuum applications when properly greased and secured. Their precision-ground 1:10 taper surface, compliant with ISO 383 and DIN 12242, ensures a gas and vacuum-tight connection. For added safety during low-pressure setups, secure the joint assembly using appropriate Keck clips or metal pinch clamps.
Yes. Being made of Borosilicate 3.3, they are fully autoclavable and resistant to repeated thermal cycles without losing their structural integrity or accuracy of the ground taper.
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