Concrete
4" Retainer Rings (2)
Meets ASTM C-1231 and AASHTO T-22 specifications.
These pad-cap retainer rings hold neoprene pads that fit into the ends of concrete test cylinders. Made from plated high-alloy steel to resist rust and deformation fatigue. Bearing surfaces machine-planed to within 0.002". Supplied two per set.
