Borosilicate Glass Stopper - Glass Plug Male (Stopper) 24/40

Borosilicate Glass Male Stopper – 24/40

This borosilicate glass male stopper is a laboratory glassware plug sized for compatible 24/40 standard-taper female joints. It is intended as a removable closure or component in appropriately matched glassware.

The 24/40 designation describes the ground-joint size and is the key compatibility reference for mating glassware. Joint sizing alone does not guarantee an airtight, leak-free, pressure-rated, vacuum-rated, or chemically compatible seal for every application.

Inspect the stopper and mating joint for chips, cracks, scratches, residue, or other damage before use. Ground-glass joints should be inserted carefully without excessive force. Use an appropriate joint clip or retention method when required by the apparatus.

Avoid sudden temperature changes that can stress laboratory glass. Confirm cleaning methods and chemical compatibility for the intended substances. Do not use the stopper in pressure or vacuum service unless the complete glassware assembly and all connected components are specifically rated for those conditions.

Browse more borosilicate laboratory glassware.

Related Products

Borosilicate Glass Y-Joint Adapter | 24/40. Confirm the adapter's joint orientation and size before selecting a closure.

Frequently Asked Questions

Which joint does this stopper fit?
This male stopper is sized for a compatible 24/40 female standard-taper joint. Inspect and check the actual fit before use.

Does it guarantee an airtight seal?
No airtight or leak-free performance is established by joint size alone. Seal performance depends on the mating surfaces and complete setup.

How should I handle ground-glass joints?
Keep mating surfaces clean, inspect for damage, and insert gently. Use appropriate retention when required by the apparatus.