1/4-100 fine-adjustment screw bushings are a standard piece of hardware used in the photonics lab. Base Lab Tools offers the finest 100 TPI (254µm/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 1/4-100 product family. These 1/4-100 fine-adjustment screws and bushings are ideal for photonics applications where slightly increased resolution (as compared to the 1/4-80) is needed, but they can easily be replaced with higher resolutions if more intricate adjustments are required.