Cast Iron Ring Clamp with 5/16" diameter stem Open boss head fitted with thumb-screw to accept rods from 5/16" to 5/8" dia Extension distance from boss head to ring is approx. 1.5" Inside Diameter of ring 2.5" Clamp from Boss head center line measures 5" to edge of closed ring. Cast Iron Ring Clamp with 5/16" diameter
Clamps — Page 4 — Eisco Labs
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5-Piece Lab-Grade Metalware Equipment Set for Science Classrooms — hBARSCI
Eisco Labs Boss Head Clamp, Die Cast Alloy, up to 16mm Rods
Eisco Labs 7.5cm diameter ring with boss head clamp — hBARSCI
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Eisco Labs 2.125 diameter Cast Iron Closed Ring Clamp with Boss Head
Eisco Hand Tools
Clamps & Bossheads — Eisco Labs
Clamps & Bossheads — Eisco Labs
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Clamps & Bossheads — Eisco Labs
Government Scientific Source
VEVOR Laboratory Grade Metalware Set - Support Stand Premium Iron Material Laboratory Stand Support Lab Clamp Flask Clamp Condenser Stand 60cm