Load indicating washers (LIW) / DTI Washers are used to develop the correct tension when installing A325 or A490 structural bolts. DTI Washers are manufactured as per ASTM F959. Direct tension indicator washers or DTI washers are manufactured in 8.8 and 9.8 grades. DTI's are like little individual weigh scales, which measure the bolt tension developed during tightening, regardless of the torque resistance of the bolt. By far the simplest method, a DTI is put on one or the other end of all bolts, and after snugging the joint by partially (but not fully) compressing the DTI, all the DTI's are "crushed" to the point where a feeler gage cannot be inserted half way around.
DTI Washers are simple washer DTI Washersload cells that are manufactured with raised dimples that are used to indicate when the proper tension level has been achieved during tightening, since tension is what we are after NOT TORQUE. DTI’s are manufactured to the F959 specification.
Kanwar Exports are the manufacturers, suppliers & exporters of Fasteners like DTI Washers in India, Punjab Ludhiana.
