Forgefix sleeve anchor fixing hex nut forgefix 5sa12129 these forgefix sleeve anchors are through fixing for ease of use and speed of installation their sleeve wedge cones are designed to give maximum expansion even in shallow anchoring depths they have a reduced outside sleeve diameter compared to thread size for smaller hole sizes offering reduced stress in base materials the anchors are zinc yellow passivated for increased corrosion resistace they offer easier fixture removal or repo