What is the tolerance range of precision screws?
What is the tolerance range of precision screws?
double-headed pin puller includes a slider hammer and a sliding rod, two ends of the sliding rod are respectively provided with different types of pin-pulling parts, the pin-pulling parts are threadedly connected with the sliding rod, and the sliding rod is also provided with There is a sliding rod limit block, and the sliding rod is slidably connected with the slider hammer. The double-headed pin puller can install two types of pin-pulling heads at the same time, and can pull out two different types of pins. It is easy to use and has high work efficiency. Disadvantage: Single function, cannot be used to install pins.
Bolt: A mechanical part, a cylindrical threaded fastener with a nut. A type of fastener consisting of a head and a screw (a cylinder with an external thread), which needs to be matched with a nut to fasten and connect two parts with through holes. This form of connection is called a bolted connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.
Screw (pinyin: luógǎn, English: screw): a cylinder with a spiral groove cut on the outer surface or a cone cut with a tapered spiral groove. The screw has a different head, the head is called an external hexagon screw. There are others, such as large flat screws, socket head screws and so on.
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard, and at the time of publication of this standard, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest edition of the following standards. GB/T90-1985 Fasteners Acceptance Inspection, Marking and Packaging -1985 Cross recessed screws GB/T1237-2000 Fastener marking method GB/T3098.1-2000 Mechanical properties of fasteners Bolts, screws and studs GB/T3098.6-2000 Mechanical properties of fasteners, stainless steel bolts, Screws and studs GB/T3098.10-1993 Mechanical properties of fasteners Bolts, screws, studs and nuts made of non-ferrous metals GB/T3103.1-1982 Fastener tolerances Bolts, screws and nuts GB/T3106-1982 Bolts , The nominal length of screws and studs and the thread length of ordinary bolts -2000 Fastener surface defect bolts, screws and studs, general requirements GB/T16938-1997 Fastener bolts, screws. Studs and nuts general technical conditions
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