Quick view Powers 5/16" x 1 1/2" Hex Nut Lock Bolt ASĀ® 5005S (Box of 100) Box of 100. The Lok-Bolt anchor is a pre-assembled single unit sleeve anchor available in carbon steel and stainless steel which can be used in concrete, block, brick and stone. Extension sleeves are added to create longer lengths. MSRP: Was: Now: $35.76 Add to Cart