Glass Threads (Size 45) With Cap
The largest standard glass thread size for building robust, removable seals into substantial custom apparatus and scientific glasswork.
Item Name:
Glass Threads (Size 45) With Cap
SKU:
70309
Description:
Glass Threads are precision ground glass connections used in scientific and technical lampworking to create a repeatable, serviceable seal between two components. This Size 45 thread is the largest in the standard glass thread line, made as a matched glass thread finish with a corresponding screw-on glass cap, allowing you to close off a vessel or port without permanently sealing it.
In practical shop use, glass threads are chosen when you need a closure that can be removed for cleaning, filling, draining, or component changes, while still maintaining a secure glass-to-glass fit. They are commonly incorporated into custom apparatus, large reservoirs, adapters, and specialty assemblies where a standard ground joint is not the preferred connection. The larger Size 45 is ideal for applications requiring a more substantial seal and greater handling durability.
How it is used:
Fire-polish and prepare the attachment area on your work so the thread can be joined cleanly without stress points. Attach the threaded finish into your assembly using appropriate lampworking technique for your glass type, keeping heat even to avoid distortion of the thread form. Anneal the completed assembly properly to reduce strain around the threaded connection. Use the matching glass cap to close the threaded opening when you need a removable seal. Remove the cap for cleaning, filling, or connecting to the next component in your build.
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