Insulation hangers with perforated base are the spindle kind of insulation anchors. The base is attached to a spindle pin to install different thermal and acoustical insulation material. The usual insulation pin diameter is 12 gauge which is used in conjunction with self locking insulation washers and mounted with adhesive.
The spindle type insulation anchor is available in stainless steel or aluminum. Some of them are low carbon steel. Both its pin and plate are galvanised. It can usually be bought from suppliers that offer all kinds of insulation anchors. The standard pack for this insulation anchor is 1 M for 1″ to 3.5″; 500 for 4.5″ to 6.5.”