A simple mechanical element, features multi hex-head clamping screws - a direct substitute of hex nut - can be attached directly on to an existing bolt/stud/threaded rod or shaft. The washer stays on load bearing surface of parts to be fixed and protects it. Tightening force (torque) is also covered due to multi clamping screw. This can be applicable in awkward position or restricted space. The nut stays tight on equipment and reduces down time due to loosening of joint effecting heavy jerk/ vibration, during operational condition. These are offered in size - metric m24 to m160/inch 1" to 6". Key attributes: economical - time and labour saving; easy to tighten/loosen by standard wrench; and reusable. Application: large/heavy machinery, heavy press, power generation plants-turbines, petrochemical plants, hydro projects, fertilizer plants, mining equipment, heavy gear-boxes, crushers, heavy engines, compressors, reciprocating equipment, etc.