A screw is a type of fastener, in some ways similar to a bolt typically made of metal, and characterized by a helical ridge, known as a male thread (external thread). A screw drive is a system used to turn a screw. At a minimum, it is a set of shaped cavities and protrusions on the screw head that allows torque to be applied to it. A washer is a thin plate (typically disk-shaped, but sometimes square) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener, such as a bolt or nut. Other uses are as a spacer, spring (Belleville washer, wave washer), wear pad, preload indicating device, locking device, and to reduce vibration (rubber washer). Spring washers, which have axial flexibility are used to prevent fastening or loosening due to vibrations. Locking (lock) washers prevent fastening or loosening by preventing unscrewing rotation of the fastening device.
Features - No.0.25 x 20 x 0.5 in. Thumb Screw with Washer Head
- Made with high quality material
Specifications - Height: 0.45 in / 1.14 cm
- Width: 0.85 in / 2.16 cm
- Length: 0.45 in / 1.14 cm
- Size: No.0.25 x 20 x 0.5 in.
- SKU: PTSWN5603