Quick Answer:The Spherical Ball Joint is an unprinted spherical ball joint with a smooth ground finish to prevent leakage, made in five sizes from S13 to S41, each with a minimum shank length of 100 mm.
Last updated: 18 October 2026
Key Features
Smooth ground surface finish to prevent leakage.
Supplied unprinted, so there is no printed marking to char.
Five sizes: S13, S19, S29, S35 and S41.
Minimum shank length of 100 mm on every size.
Technical Specifications
Specification
Value
Size S13
Approx. bore 5; minimum shank length 100 mm
Size S19
Approx. bore 9; minimum shank length 100 mm
Size S29
Approx. bore 15; minimum shank length 100 mm
Size S35
Approx. bore 19; minimum shank length 100 mm
Size S41
Approx. bore 27; minimum shank length 100 mm
How It Is Used
The ball joint pairs with a spherical cup joint of the same code, for example S29 with S29, to connect two pieces of glassware. The smooth ground surfaces seal against each other to avoid leaks.
Related Lab Glassware
See the full lab glassware range, or these related spherical and conical joints: