Definition of Precision Hardware
It refers to machine parts or components made of hardware, and some small hardware products. It can be used for individual purposes or as an aid. For example, hardware tools, hardware parts, daily-use hardware, construction hardware and security products, etc. Most of the small hardware products are not final consumer goods. Rather, they are used as ancillary products for industrial manufacturing, semi-finished products and tools used in the production process, etc. Only a small part of...
Fastener material introduction
Various stainless steel products: bolts, nuts, washers and various non-standard parts containing 304, 304L, 316, 316L, 310S and other grades Carbon steel products of various grades and plating: bolts and screws of 4.8, 8.8, 10.9 and 12.9 grades; nuts, washers, non-standard parts of various grades, etc.
What are the uses of different screw head types do you know?
We all know that screws are custom manufactured according to the use of the product. It is true that the screw specific to what head type, what specifications of the screw, then we have to choose according to the workpiece reserved slot or gap and the head to play what role. Like our common screw head type has a flat head, pan head, countersunk head, large flat head, hexagonal head, etc., so today's custom screw manufacturers to take you to understand the different screw head type are used in...
Introduction of fasteners
Fasteners are mainly screws, nuts, nuts, bolts, screws, studs, the difference between them: the standard statement is no screws and nuts. Screw is the common name, with external threads can be called "screws". Nuts are usually hexagonal in shape, with internal threads in the bore, and are used to work with bolts to tighten the relevant parts. Nut is the common name, the standard should be called "nut". The head of the bolt is usually hexagonal with external threads on the rod. Screws are...
Introduction of self-tapping screws
self-drilling screws connect components in one work step: they drill, form the thread and fasten. This reduces the installation time, saves tool changes and costs for drills. The self-drilling screws are completed by an optional pre-assembled sealing washer. self-drilling screws are available in stainless steel for weather-exposed areas and in zinc-plated steel for unweathered areas.
bolts and nuts manufacturers
The most detailed introduction of the bolts analysis: A type of fastener consisting of a head and a screw (a cylinder with an external thread) is required to be fitted with a nut for fastening the two parts with through holes. This type 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. Because bolts are also a type of railroad accessory, railroad fittings are part of the railroad...
High-strength bolts|Steel structural bolts|Twisted shear bolts, 10.9S bolt analysis
High-strength bolts are mostly used for the connection of bridges, rails, high-pressure and ultra-high-pressure equipment. The breakage of such bolts is mostly brittle fracture. High-strength bolts used in ultra-high-pressure equipment need to be applied to ensure the sealing of the container. Several concepts about high-strength bolts 1. According to the specified performance level of bolts above 8.8, it is called high-strength bolts. The current national standard is only listed to M39. For...
How are self drilling screws measured?
They are measured from the top of the head to the tip. Hex and hex washer head screws and bolts, although flat on the top and the bottom, are measured from the bottom of the head. From that point to the tip is the length of the screw. Self drilling screws are measured all the way to the end of the drill point tip.
What are the hardness indexes of bolts? What is the hardness of bolts?
Hardness indicates the ability of a material to resist the pressing of a hard object into its surface. It is one of the important performance indicators of metallic materials. It is understood that the higher the hardness, the better the wear resistance. Commonly used hardness indexes are Brinell hardness, Rockwell hardness and Vickers hardness. 1. Brinell hardness (HB) A certain size (usually 3000kg) of a hardened steel ball of a certain size (typically 10mm in diameter) is pressed into the...
Steel structural bolts | Big hexagon bolts | High-strength bolts | Torsion bolts | Huayong www.hdgangjiegou.com
Steel structural bolts, large hexagon bolts, high strength bolts, shear bolts, steel structural shear bolts, we are professional steel structure shearing screw manufacturers, provide Hebei Yongnian steel structure shear bolt bolts price, steel structure torsional shear screws model , Steel structure shear screw specifications, product quality, excellent industry, excellent quality. Steel Structure Torsion Screw Introduction: Steel Structure Torsion Screw is a kind of high-strength bolt and it...
[New] Aerospace Standard HB/QJ Nylon Locking Hex Flange Nut and Slotted Hex Head Bolt
[New] Aerospace Standard HB/QJ: Nylon Locking Hex Flange Nut HB 5960-1986 (Nylon Insert Hex Flange Lock Nut) [New] Aerospace Standard HB/QJ: Slotted Hex Head Bolt HB 8035-2002 (Slotted Hex Head Bolt) In this NetEase tight fastener network standard data column, you can check the national standard data of more fasteners for free, industry standard data.
Electric ball valve installation and maintenance
Electric Ball Valve It has the action of rotating 90 degrees, the plug body is a sphere, with a circular through hole or passage through its axis. Electric ball valve is characterized by its compact structure, reliable sealing, simple structure, easy maintenance, sealing surface and the spherical often closed state, easy to be media erosion, easy to operate and repair. Ball valve in the pipeline is mainly used to do electric ball valve cut off, distribution and change the flow direction of the...
Uses and Shapes of Liner Bolts Special Ball Mill Bolts
Liner bolts, also known as ball mill bolts, English name: bolt for ball mill. According to the shape of its head can be divided into: elliptical head bolts, square head bolts, bolts with bolts, waist bolts, bucket bolts, D-bolts, flared bolts and so on. The ball mill bolts can be classified according to the use position: compartment liner bolts, discharge rocker bolts, stepped liner bolts, cylinder bolts, fixed cone liner bolts, import and export hopper lining bolts, compartment bolts, manholes...
zw self-priming non-clogging sewage pump resolution
zw series of self-priming non-clogging sewage pump is a new product developed successfully on the basis of repeated research of similar technologies at home and abroad. The pump set self-absorption and non-clogging sewage in one, the use of axial reflux mixed outside, and through the pump body, impeller runner unique design, as the general self-priming pump does not need to install the bottom valve and irrigation water, But also suction row containing large particles of solid and long fiber...
The role of washers Types of washers
Although the washers are inconspicuous, they play a vital role. The types of washers vary in size, material, and function. Xiao Bian and everyone today said that the role of washers to see how the various washers have the kind of use it! The role of washers - copper asbestos pad Copper asbestos pad, it has the characteristics of high pressure and high temperature resistance. It is generally suitable for engine cylinder pad. When it is used, it must first remove the dust and dirt on it, and pay...
Stainless steel embedded parts sleeve non-standard parts processing embedded parts sleeve sales wire sleeve manufacturers customized
The main products of the company are stainless steel hexagon, hexagon, double head, teeth, machine screws, tapping screws, U bolts, anchor bolts, T screws, Lag screw, chemical anchor bolts, stainless steel tension screws, drilling screws, carriage bolts, bolt, marble pendant, rings, flower basket screws, articulated screw, screw pin, cylinder pin, taper pin, turning things with the red pieces, super long large bolt and nut custom, connector, plug and throat hoop, flange, Marine accessories,...
How to avoid the seizure of stainless steel screws and stainless steel nuts
Why can't stainless steel screws and stainless steel nuts be used together? This is mainly due to the material of the stainless steel. When the stainless steel screw is assembled with the stainless steel bolt and the stainless steel nut in the assembly of the low temperature pipe flange, the seizure often occurs, and it is difficult to remove it. stainless steel screw Therefore, stainless steel screw manufacturers generally do not recommend stainless steel screws and stainless steel nuts. If...
Introduction to the basic knowledge of 8.8 hex combination screws
The 8.8 hex combination screw refers to a 8.8-level cylindrical head hex screw with a spring pad fastened together with a flat pad combination fangs. The three assembly pieces. The 8.8-class hexagon socket combination screw is manufactured from the material of the screw wire 10B21. After hitting the 10B21 screw wire pier, it needs to be heat treated, that is, we often say that it is hardened and hardened to reach 8.8. After the hardening is completed, in order to prevent the elastic pad in the...
Improved grinding method for flat washers
In production, flat washers with high parallelism accuracy are often encountered. How to ensure the accuracy of parallelism has always been a difficult problem in production. When grinding a flat washer with a parallelism requirement of 5Pm, after testing, the method of padding 45 steel plate on the flat grinding disk basically solves the problem. The steel plate is placed on the flat grinding disk in order to prevent the workpiece from being deformed by excessive magnetic force, and then the...
ASTM F436M metric series hardened steel flat washers technical requirements
First, the scope of application Second, the type of gasket material and the type of gasket Fourth, mechanical properties (1) The hardness of the quenched and tempered steel washer is 38 to 45 HRC. The hardness of the hot-dip galvanized gasket is 26 to 45 HRC. (2) The depth of the carburized layer of the carburizing gasket should be ≥0.40 mm. The hardness is 69 to 73 HRA. (3) Mechanically galvanized gaskets shall have the same surface hardness. V. Number of test samples Sixth, supplementary...
Classification and dimensions of hex nuts
Hex nuts are divided into three types: I, II and thin according to their nominal thickness. Nuts above level 8 are divided into two types, type I and type II. The type II hex nut is relatively thick, and is often used in occasions where assembly and disassembly are often required. I-type nut refers to a common hexagon nut with a nominal height m ≥ 0.8D of the nut. ?? The height of the type II nut is higher than that of the type 1 nut, and its type size should conform to GB / T6175. The purpose...
Hex bolt standards, what are the types of hexagon bolts?
Hexagon bolts are actually called a variety of methods. For example, they can be called hexagonal screws. For example, they can be called hexagonal screws. It can also be called a hexagonal bolt. This is the same meaning. It’s just that personal habits are different. The following creation of the screw manager Zhu introduced the basic knowledge of the hexagonal screw standard. 1. Ordinary bolts are divided into three types: A, B, and C. The first two are refined bolts and are less used....
In the standard, coarse hex head bolts are divided into preferred and non-preferred specifications.
Building a bolt parameter database Creating a standard parts library requires the use of a database to store the data of the part class. Two databases need to be created when designing the bolt database: 1 parameter database of bolts of various specifications; 2 bolt standard length series database. In the design of the database, some data needs to be added for the convenience of control. For example, when controlling the length range of bolts of a certain specification, two columns of data...
