Glass Threads (Size 25) With Cap
A mid-size threaded closure for custom scientific apparatus and specialty glasswork where removable seals matter.
Item Name:
Glass Threads (Size 25) With Cap
SKU:
70307
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 25 thread is 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, small reservoirs, adapters, and specialty assemblies where a standard ground joint is not the preferred connection.
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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