31C350ASF,Sleeve anchor, sup-r-sleeve, thunderbolt, bolt sleeve anchor, lok bolt, lock bolt, dynabolt, sleeve all, sleeve anchors, concrete anchor, block anchor, masonry anchor;Sleeve anchor, sup-r-sleeve, thunderbolt, bolt sleeve anchor, lok bolt, lock bolt, dynabolt, sleeve all, sleeve anchors, concrete anchor, block anchor, masonry anchor,5/16 X 3 1/2 FLAT HD SLEEVE ANCHOR,Jugenheimer Industrial Supplies, Inc.