Metallics J1566 Anchors Sprg Wing TogBt 1/4" 3" (Jar 50)

That is exactly the job these are built for. A spring wing toggle drops through a hole in a hollow wall, the wings spring open behind the material, and tightening the 1/4 inch bolt clamps the fixture to the face. Metallics catalogues the J1566 as an electrical fastener, so it is the standard pick for strut, conduit straps, boxes, and panel mounting on drywall, hollow block, and hollow tile. In solid concrete or solid brick there is no cavity for the wings to open into, so use a sleeve or wedge anchor instead.

A 1/4 inch spring wing toggle needs a hole big enough to pass the folded wings, not just the bolt, which is why the drilled hole runs considerably larger than the bolt diameter. Fold the wings flat against the bolt of the J1566 and size the hole to clear that assembly, typically a 3/4 inch bit for a 1/4 inch toggle. Drill too small and the wings jam in the opening; drill too large and the fixture loses bearing on the face of the wall.

Fifty complete spring wing toggle bolt assemblies per jar, bolt and wing nut together. That is the pack you buy, so for a job hanging a run of strut, conduit, or boxes on hollow wall, count your points and order jars accordingly rather than individual pieces.

No. Once the bolt on the J1566 is backed out, the spring wings drop off inside the wall cavity and cannot be retrieved. If you expect to remove and reinstall the fixture, plan on a fresh toggle each time, which is one reason these ship fifty to a jar. For repeated access, a threaded insert type anchor that stays in the wall is the better choice.

The 3 inch bolt length on the J1566 covers two layers of 5/8 inch drywall with room to spare. Add up your wall thickness plus the thickness of the strap, strut, or box flange you are fastening, and the toggle still needs a bit of bolt past that for the wing nut to ride up on. At 3 inches you have enough for most hollow wall assemblies; on a very thick furred out or plaster over lath wall, measure before you commit.