Are reverse threaded bolts standard Are threads the same as bolts?

1. The reverse threaded bolt is a standard part.

2. Standard parts refer to the commonly used parts (parts) that have been completely standardized in all aspects such as structure, size, drawing method, marking and produced by professional factories, such as threaded parts, keys, pins, rolling bearings, etc. In a broad sense, it includes standardized fasteners, couplings, transmission parts, seals, hydraulic components, pneumatic components, bearings, springs and other mechanical parts. In the narrow sense, only standardized fasteners are included.

The standard parts commonly known in China are the abbreviation of standard fasteners, which is a narrow concept, but the existence of a broad concept cannot be ruled out. In addition, there are also industry standard parts, such as automotive standard parts, mold standard parts, etc., which also belong to generalized standard parts.

Reverse threaded bolts are standard parts, but they are generally used less often, not too stock, and should be customized.

To do American bolt nuts, American bolt nuts, American standard bolts and nuts, you must have American screw standards. You should buy a set of the latest American fastener standards encyclopedia "IFI Inch Fastener Standards Book" (8th Edition, IFI Inch Fastener Standards Book) (English Edition) (published in 2011), experts are the winners, and the relevant business will be owned only if you have the standard.

I** the latest American fastener standards encyclopedia "IFI Inch Fastener Standards Book" eighth edition ("8th Edition, IFI inch fastener standards book"), see my space for details.

Yes, it is generally called a reverse thread bolt, but there are not many of them.

Yes, you're talking about the buckle of the screws.

It's one thing. Threaded connection.

It is a widely used detachable fixed connection, which has the advantages of simple structure, reliable connection, and convenient assembly and disassembly. The traditional method of thread inspection and dispatch is to use the thread gauge for contact or the use of a universal tool microscope for manual measurement, which has a large workload, low work efficiency gauge, and the measurement results are easily affected by humans.

In tactile measurements, threaded gauges are prone to wear and tear, which affects measurement accuracy and is costly to replace gauges. In addition, in some workplaces, it is difficult to complete the inspection work manually. To this end, automatic thread testing equipment is needed to solve the bottleneck problem of thread detection to improve the efficiency of fastener enterprises.

The standard ruler and Chang cover size of ordinary screw threads are divided into .More than 10 grades of 9 grades. Standard screws include bolts, screws, studs, nuts, machine screws, self-tapping screws, washers, pins, rivets, and retaining rings.

It is the first piece of the basic zero Xun that is widely used in all aspects, and its function is to play the role of connection fastening. The connection form can be divided into detachable connection (connection with bolts, nuts and other threaded fasteners) and permanent connection (connection with rivets).

Inspection Items:

The inspection items of standard fasteners are divided into three parts, namely size, mechanical properties and surface defects. The specific inspection items of each part have different regulations according to different products.

For example, the size inspection item for the hexagon nut is specified as the thread gauge, thread stop gauge, thread diameter, opposite side width, diagonal size, nut height, and the perpendicularity of the nut bearing surface and the thread axis.

The flat washer is specified as the inner diameter, outer diameter, thickness, coaxiality of the outer circle to the inner hole, and flatness. The mechanical property test items are specified as hardness and tensile strength for hexagonal nuts; The stiffness of the flat washer is specified only for the calling.

Inspection method: The inspection method of standard fasteners is specified in the technical conditions of the product. Professional standards have been developed for fastener testing methods (dimensional and geometric accuracy sections).

The above content refers to Encyclopedia - Standard Screws.

Legal analysis: The standards for fully threaded screw car banquet bolts are:

GB T 5781-2000 Hex Head Bolt Full Thread Class C.

GB T 5783-2000 Hex Head Bolt Full Thread.

GB T 5786-2000 Hex Head Bolt Fine Thread.

Fully threaded. Legal basis:

Fasteners for Steel Pipe Flanges (PN Series)" standard specifies the form, size, material, marking, technical requirements and use regulations of fasteners for this silver flange PN series of steel.

The standard applies to the chemical industry standard HG T

Fasteners for steel pipe flanges (PN series), including hexagon head bolts, equal-length stud bolts, fully threaded bolts and nuts.

The size and tolerance of the fully threaded stud and the chamfering of the sails at both ends are required according to the provisions of GB T901, and the specifications and materials of the fully threaded studs are according to the provisions of the table.

How to see whether the bolt of the national standard part is an inner hexagon screw or an outer hexagon: the inner hexagon bolt occupies much less space, the inner hexagon can be installed in a deeper position during installation, and the outer hexagon installation (including fastening) requires a large space. Distinguish between hexagon bolts and hexagon bolts 2, Liang Xianxin's general hexagon is harder than the general rubber wheel hexagon bolts.

3. The head of the hexagon bolt can be sunk to the chain surface of the part, which is not exposed, reduces the overall size, and the appearance is beautiful, and does not hinder other parts 4. The hexagon bolt is suitable for places where it is often disassembled (the head is harder than the hexagon), or where the space is limited.

As a kind of fastener, the jacket nut should usually meet the requirements of the national or industry standards, and be inspected and tested for quality before formal use. In China, jacket nuts should be produced and inspected in accordance with the national standard GB6170-2000 "Hexagon Head Nut" or GB6171-2000 "Hexagon Thin Nut" and relevant industry standards.

National standards are formulated to ensure the quality and safety of products, as well as interchangeability and standardization in the process of production, processing and use. Therefore, the jacket nut produced in accordance with the national standard has reliable performance and quality, and the bright cavity can be used in conjunction with other products that meet the standard, so as to ensure the safety and efficiency of production and use.

In short, in order to ensure product quality and safety, it is recommended to choose jacket nuts that meet national or industry standards, and conduct sufficient inspection and testing before formal use.

To put it simply, the standard parts are to have a national standard reference can be found, special-shaped bolts belong to a kind of non-standard parts, commonly used special-shaped bolts such as: square bolts, T-bolts, oval head bolts, ingots screws, etc. are national standards, and there is no standard for special equipment, the so-called non-standard parts.

It is generally believed that hexagonal head bolts should be ordinary bolts. In fact, there are also large and large books. If it is necessary to distinguish between special-shaped bolts and ordinary bolts, in terms of their shape alone, it should be:

All bolts with national standards should be ordinary bolts (such as hexagon head bolts, cylindrical head hexagon bolts, stud bolts, slotted bolts, cross groove bolts, square head set screws anchor bolts, etc.), there is no national standard of bolts called special-shaped bolts, it is generally used in special occasions, special purposes, but also need special tools to fasten and loosen it. Therefore, special-shaped bolts are not standard parts.

Bolts: mechanical parts, cylindrical threaded fasteners with nuts. A type of fastener consisting of a head and a screw (a cylinder with an external thread) that is used in conjunction with a nut to fasten two parts with through holes.

This form of connection is called bolted connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.

No, if it's standard, it's not called alien.

Shandong Screw World can customize all kinds of standard parts and special-shaped parts.

The so-called "standard parts" refer to fasteners guided by national standards and specifications, and our Chinese fastener (GB T) standards are compiled by the "Chinese Mechanical Engineering Society"; Fasteners that can be marked and checked in the standard specifications are "standard parts", and "special-shaped bolts" can only be called "non-standard fasteners" in the industry; However, we usually call it "enterprise standard" fasteners, which are designed by each company for their own products, but some sizes or technical parameters will definitely refer to the national fastener standards and specifications when designing; Knot: The scope of standard parts is wider than that of fasteners; Friends, you can go to the larger Xinhua bookstore to check the relevant standards and specifications!