Im always hesitant when buying SCREWS online, but these Machine Fillister Phillips Threaded Threads really came through .Based on my observations they're perfect for industrial and scientific applications. The threads are strong and consistent, never stripping or breaking, and they fit snugly every time. The only downside is the price, which is a bit high compared to other screws. But overall, I'd definitely recommend these threads for anyone looking for top-notch quality..