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Although flange fittings are bulky, they perform well in demanding applications such as large water supply networks and hydroelectric systems. Flanges are rated at 150, 300, 400, 600, 900, 1500, and 2500 psi; or 10, 15, 25, 40, 64, 100, and 150 bars of pressure. Various types of flanges are available, depending on construction.
Wrench size. spanner (wrench) size and thread diameter of a hex nut. Width across flats is the distance between two parallel surfaces on the head of a screw or bolt, or a nut, mostly for torque transmission by positive locking. The term width across flats (AF) is used for the following forms: 2-socket = round material with two surfaces.
Nut (hardware) An M4 nut threaded onto an Allen key socket head screw. A nut is a type of fastener with a threaded hole. Nuts are almost always used in conjunction with a mating bolt to fasten multiple parts together. The two partners are kept together by a combination of their threads' friction (with slight elastic deformation), a slight ...
Wingnut (hardware) Three wingnuts. A wingnut, wing nut or butterfly nut is a type of nut with two large metal "wings", one on each side, so it can be easily tightened and loosened by hand without tools. A similar fastener with a male thread is known as a wing screw[1][2] or a wing bolt. [3]
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A locknut, also known as a lock nut, locking nut, self-locking nut, prevailing torque nut, [1] stiff nut[1] or elastic stop nut, [2] is a nut that resists loosening under vibrations and torque. Prevailing torque nuts have some portion of the nut that deforms elastically to provide a locking action. [2] Free-spinning locknuts exist which carry ...
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