Metallics SWA1254 Anchors 1/2 x 5-1/2" Cracked Concrete (Jar 25)

It is a cracked concrete anchor, so it is the one to specify when the drawing or inspector calls for a cracked concrete rated mechanical anchor rather than a standard uncracked-only wedge anchor. That covers seismic and wind zones where the design assumes the slab will crack at the anchor location.

A 1/2 inch anchor uses a 1/2 inch carbide hammer-drill bit; the nominal anchor diameter and the bit diameter match on wedge-type mechanical anchors. Drill the hole deeper than your intended embedment so dust has somewhere to go, and blow it clean before setting.

The SWA1254 is specified for concrete, and cracked concrete in particular. Hollow block and brick behave nothing like poured concrete under an expansion anchor, so for those bases use a fastener rated for hollow or masonry base material instead. Keep this one in solid concrete.

Order Metallics SWA1254. That part number is the 1/2 x 5-1/2 inch cracked concrete anchor in the 25 count jar, and it is the only configuration the number covers, so there is no length or finish option to specify alongside it.

It is the fastener electricians reach for when anchoring into concrete: strut and trapeze hangers, transformer and panel mounting feet, generator and equipment pads, pipe supports, and machine bases. Metallics catalogs it as an electrical anchor fastener, and the 1/2 inch diameter is the common size for supported loads rather than light conduit clips.