Lead screws and assemblies, by Universal. Welcome to Universal-Thread.com! Universal, in business over 50 years, manufactures high quality lead screw (leadscrew) assemblies for your most demanding linear displacement applications. Accuracies to 10 microinches per turn, 25 microinches per inch Unmatched Performance Universal lead screw assemblies offer lead accuracies to 10 microinches/turn, 25 microinches/inch, the best in the industry. Our standard lead screws (leadscrews) , stocked for immediate delivery, offer you lead accuracies of 50 microinches/turn, 100 microinches/inch. Our dual thrust