... Tx15 & Tx25, hex shape on the middle, with six-lobe. High quality steel Wood thread Hanger bolts ,Tx15 & Tx25, hex shape on the ... middle, with six-lobe.Made of Carbon Steel, Customized Designs are AcceptedMaterial: carbon steelSize:available in various ... sizesPlatings: zinc, black, yellow or gray phosphate and H.D.GMachine: formingCustomized designs are accepted