“PF” Make Hign Strength Structural Bolt Assembly (HSFG Bolt Assembly), Consists of Bolt, Nut & Hardened Washer. Our Bolts are Conforming to IS, ISO or ASTM Standard as per Customer Requirements. DTI Washer is Optional and Hence Extra By default we supply the products in zinc phosphate coated & Oiled condition. Other type of surface finish can be supplied as per customer’s specifications.