DEWALT. 5/8" Zamac Alloy & Lead Expansion Screw Anchor, #10 Internal Thread Dia., 100 PK. Item # 30TC48. Mfr. Model # 09210-PWR. UNSPSC #. Catalog Page # N/A. Country of Origin Vietnam. Country of Origin is subject to change. These caulking anchors are designed for use with light-duty applications in hollow-walls, brick, and block.