Product Features

  • Available in Size 12, Size 18, Size 28, and Size 35.
  • Use to securely assemble and hold component parts of glass ball and socket or O-ring joints.
  • Made of high-quality stainless steel, ensuring it's durably and sturdily constructed. 
  • Screw type locking nut design. 
  • StonyLab aims to provide high-quality products with satisfying customer service. 


Product Options

  • Size 12: XL-815473
  • Size 18: XL-815323
  • Size 28: XL-815324
  • Size 35: XL-815325

Spherical Pinch Clamp, Stainless Steel Joint Clamp Holder, Screw Locking Nut

SKU: XL-815603
  • Processing Time

    Usually Ship in 5 - 7 Business Days. Shipping may take longer than expected during COVID-19.

Customer questions & answers



Just received it. Haven't heated, or dropped, it yet. The interior diameter of the opening is 1 3/8 in, or 34.9 mm, which means a #8 stopper should work.<br><br>No visible bubbles or deformations.

Brandon Shelton

First things first, if you do decide to purchase this to use with a Buchner funnel you are absolutely going to need adapters or cones for your funnel. If you search "buchner funnel adapters" on here you should be able to find them.<br><br>Glass arrived with no visible defects. Have used several times with a glorified aquarium pump and Buchner funnel for distillation and making tinctures. Works without issue, but the mouth of the flask is quite large and Buchner funnels tend to run "thin." To remedy this just buy adapters.

Dawood Ajmi

BROKEN!! ITEM ARRIVED BROKEN, Shattered Glass Allover the Package!!!

Evan Clinthorne

Great value. Works as needed. Minor imperfections that do not impact use.

Jason huston

Cracked Bad rubber .I don't think this is rubber it is flaky dry garbage that will drop crumbs of rubber into your expierament



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Nesconset, New York 11767


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