Clevises are components of a clevis fastener assembly that are used with a clevis pin to connect to a tang or clevis mount. Clevis fasteners allow motion around the clevis pin axis and limit motion along the axis while restricting motion in other axes. Clevises may also be referred to as clevis joints, the fork ends, and yoke ends. Clevises are provided as components of tie rod assemblies that Portland Bolt manufactures and are often used in conjunction with turnbuckles. In a typical cross bracing assembly, a threaded rod is supported at each end by a clevis. One end of each clevis will grip onto a steel plate and is secured with a pin. When a single tie rod is used between two clevises, one end of the assembly uses right-hand thread and the other end uses left-hand thread. As the rod is turned, the assembly draws tight. When a turnbuckle dissects the rod assembly, both clevises (and the end of the rods threading into them) will use right-hand thread. The opposite end of one of the two rods which make up the assembly will require the left-hand thread to mate with the turnbuckle.
When ordering clevises, several pieces of information need to be specified including clevis number, finish, the diameter of tap, thread direction, grip, and pin.
Shackles are simple clevises used with only a pin.
Twist clevises, or twist shackles, are manufactured from a twisted metal rod and include a loop at the end, 90 degrees from the clevis pin axis.
Hanger clevises, usually manufactured from formed sheet metal, combine a U-shaped component joined to a V-shaped component with a clevis pin. The V-shaped component has a flat section with a hole hanging from a rod. Hanger clevises are commonly used for hanging pipes.
A twin clevis, or double clevis link, has two clevises oriented opposite each other. Twin clevises are used to link two components together.
Other components of a clevis fastener include a clevis pin and a tang. When the tang is attached to a flange with mounting holes, it may be referred to as a clevis mount, clevis foot, clevis bracket, or rod eye.
DIN, IS, ISO, EN, ASME, and all international standards