In any given HVAC (Heating Ventilation Air Conditioning) project whether it is a small air conditioning or ventilation project or it is a large central AC / ventilation project, the need for nuts bolts and washers is massive. In ductwork nuts bolts and washers are needed to suspend the rectangular, oval or round ducting. Not only ‘nut bolt washer etc.’ are needed to suspend the duct but also ‘nut bolt washer etc.’ are needed to connect one piece of duct with another. Similarly, to suspend ceiling suspended AHUs (Air Handling Units), indoor machines of duct-able units, indoor machines of VRF VRV system, nuts bolts and washers are needed. MS and copper Pipelines are also suspended using various sizes of nuts bolts and washers. Nuts bolts and washers are available from 5 mm diameter to 100 mm diameter. However, 8 mm, 10 mm, 12 mm nuts bolts and washers are most frequently used in an HVAC project. Nuts bolts and washers are sold per KG. Different types of Nut Bolt Washer are used for specific applications.