Double Male Glass Coupler - 84 mm - (24/40) Made of Borosilicate

The 84 mm Double Male Glass Coupler 24/40 is a borosilicate laboratory adapter with male ground-glass connections for joining compatible female 24/40 components. Its approximately 84 mm overall format provides a compact connection between pieces of laboratory glassware where a double-male adapter is required.

Both sides should be checked for joint size and orientation before assembly. A 24/40 designation describes the standard taper connection, but it does not make the coupler compatible with different joint sizes or female/male arrangements. Never force ground-glass components together when fit is uncertain.

The 84 mm Double Male Glass Coupler can be incorporated into compatible reaction, reflux, distillation, transfer, or general laboratory assemblies. Its function is to provide a glass connection rather than to establish the operating limits of the system. Pressure, vacuum, temperature, and chemical compatibility depend on the complete apparatus and procedure.

Inspect both ground joints and the center glass section before each use. Chips, cracks, deep scratches, impact damage, or damaged sealing surfaces are reasons to remove the adapter from service. Support connected apparatus independently where needed so the coupler is not carrying excessive weight or side load. Borosilicate glass offers useful thermal characteristics but should still be protected from inappropriate thermal shock.

The 84 mm Double Male Glass Coupler 24/40 provides a straightforward way to connect two compatible female-joint components. Browse additional adapters, flasks, and laboratory glassware in our Borosilicate Glass Laboratory Equipment collection.

Not sure whether your glassware will fit? Read our Laboratory Glass Joint Size & Compatibility Guide to understand 24/40 dimensions, male and female joints, and matching adapters before ordering.

Related Products

Borosilicate Glass Y-Joint Adapter | 24/40. Confirm complementary joint orientation and actual fit before connecting components.

Frequently Asked Questions

Which joints does this coupler connect?
It has male 24/40 connections intended to join two compatible female 24/40 components.

What length is listed?
The product information identifies an approximately 84 mm overall format. Verify dimensions if spacing is critical.

Does the coupler determine the system's operating limits?
No. Temperature, pressure, vacuum, and chemical suitability depend on the complete apparatus and documented component ratings.