1/4-80 fine-adjustment screw bushings are a standard piece of hardware used in the photonics lab. Base Lab Tools offers the finest 80 TPI (318µm/rev) bushings available.Shipped from readily available stock and made in the USA. Fine-adjustment screws and bushings are sold separately to easily mix and match. 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 and bushings at unbeatable prices. All of our fine-adjustment screws and bushings are designed to be mixed and matched within our 1/4-80 product family. These 1/4-80 fine-adjustment screws and bushings are ideal for many photonics applications, but where slightly increased resolution is needed, they can easily be replaced with 1/4-100 fine-adjustment screws.