TOGGLER SNAPTOGGLE BA Toggle Anchor, Zinc-Plated Steel Channel, Made in US, 3/8" to 3-5/8" Grip Range, for 3/16"-24 UNC Fastener Size (Pack of 100 Anchor, No Bolts Included): Amazon.com: Industrial & Scientific
TOGGLER BA 3/16"-24 Heavy-Duty Wall Anchors w/Bolts 10 Pcs.