Metallics JDIA14D Anchors 1/4-20 Drop-In Ancr St-zn (Jar 100)

The JDIA14D is a 1/4-20 drop-in anchor, so it takes a 1/4 inch bolt or threaded rod with standard 20 threads per inch coarse thread. The internal threads are set in the anchor body, so you thread the fastener straight in after the anchor is set, rather than relying on a wedge or sleeve clamping the bolt.

Yes, that is the usual use for a 1/4-20 drop-in anchor like the JDIA14D. It sets flush in a drilled hole in solid concrete and leaves a female 1/4-20 thread at the surface, so you can thread in rod, a bolt, or a hanger and remove it later without disturbing the anchor. If you need a fastener that goes through the fixture and into the base material in one shot, a wedge or sleeve anchor is the better type; drop-ins are for threaded, removable overhead connections.

They are steel with a zinc plating, which is the normal finish for interior dry concrete work such as conduit hangers, strut, and equipment mounting. For exterior, wet, or corrosive locations, specify a stainless anchor instead; zinc plated steel is not intended for sustained moisture exposure.

Order Metallics JDIA14D. That part number covers the 1/4-20 steel zinc drop-in anchor supplied in a jar of 100, and it is the only configuration under that number, so there is no size or finish option to specify.