C.R. LAURENCE HB516212S CRL Stainless Steel 5/16"-18 x 2-1/2" Hanger Bolt. These CRL Stainless Hanger Bolts can be used in wood, or with plastic anchors. Available in Stainless Steel or Zinc finishes, they have a 5/16"-18 thread that will secure all 1-1/4" (31.7 mm) Standoff Bases.. Part Numbers Variations: HB516212S