3M Thermally Conductive Silicone Interface Pad 5586, 210 mm x 300 mm x 3M Soft Interface Disc Pad 3M United States 3M Hookit Soft Interface Pad 3M 50396 150MM X 10MM SOFT INTERFACE PAD 15 HOLE HOOKIT eBay UK. 3M 28322 6" Soft Interface Pad Soft Interface Pad (to be inserted in between the backing plate and the pad), increases conformability, allowing the technician to follow contours and get in closer to most edges. Constructed of a soft durable foam. Also enables a more versatile uses with specific and more rigid pads, such as Rupes MF pads.