Metallics J1544 Anchors Sprg Wing TogBt 3/8" Trd 16 Lgt 3" (Jar 25)

The J1544 is a spring wing toggle bolt with a 3/8 inch machine screw thread, 16 threads per inch, and a 3 inch bolt length. The spring-loaded wings thread onto that 3/8-16 bolt and snap open behind the wall once pushed through the hole.

Spring wing toggles like the J1544 are made for hollow bases, drywall, lath and plaster, hollow block and hollow metal, where there is open cavity behind the material for the wings to spring out. In solid concrete or solid brick there is no cavity, so a toggle cannot set and you need a solid-base anchor such as a wedge anchor or a sleeve anchor instead. The 3 inch bolt length limits you to a fairly thin base material plus the fixture thickness, since the wings must clear the back of the wall before they open.

Each jar holds 25 of the 3/8-16 x 3 inch spring wing toggle bolts. The jar pack is how electricians and MRO stockrooms usually buy them, so one container covers a run of box, strut or fixture hangs without loose parts rolling around a gang box.

Yes. With any spring wing toggle the hole has to be large enough to pass the folded wings, not just the 3/8 inch bolt, so the drilled hole is noticeably oversized compared to the screw. Fold the wings flat along the bolt, push the assembly all the way through until you hear them snap open, pull back to seat them against the inside face, then tighten. If the hole is drilled to bolt size the wings will not pass and the anchor is wasted, because the wings cannot be recovered once dropped inside the cavity.

Order Metallics J1544. That is the manufacturer part number for the 3/8-16 x 3 inch spring wing toggle bolt supplied 25 to a jar, and it is the single ordering option, so there are no finish or size choices to pick.