3/16-200 Sapphire tipped fine-adjustment screws are designed to facilitate and ultra low-friction environment. Base Lab Tools offers the finest 200 TPI (127µm/rev) screws available.Shipped from readily available stock and made in the USA, these fine-adjustment screws and bushings are sold as a matched pair to assure the tightest fit possible and to prevent debris from getting caught in the threads. The right fine-adjustment screws are paramount to proper adjustments of motion applications like mirror mounts, translation stages, and rotation platforms in any photonics lab. Base Lab Tools has brought to the photonics community the world’s best fine-adjustments screws at unbeatable prices. All of our fine-adjustment screws are epoxy free and higher quality than standard class 3A screws. These 3/16-200 fine-adjustment sets are ideal for more sensitive photonics applications where standard 100 TPI and 127 TPI threads are not sufficient.