Digital Human Modeling (DHM) is one of the important tools used to simulate the workplace for providing ergonomic solutions and improved workstation design. Human manikins are built into software, easily manipulated to evaluate workstation design and prevalence of musculoskeletal disorders. The most common complaints in small scale industries are related to MSDs and mismatch between operator and work station. These issues if not resolved early, may lead to further serious problems affecting the efficiency and productivity. The present work is taken up to study and analyze working posture in nut bolt manufacturing industry by RULA assessment method (Rapid Upper Limb Assessment) using CATIA software. The manufacturing of bolts consists of cold forging, trimming, threading and heat treatment. The awkward/unnatural postures of operators are assessed for risks using RULA. The actual postures are built in CATIA software and possible changes made to show improved postures with low or negligible risks and suggest low-cost ergonomic interventions. Suggestions for improvement and low-cost interventions are based on ergonomic principles and anthropometry. The overall study highlights that working posture risks can be reduced, if proper and timely ergonomic interventions are implemented.