What is the difference between the three concepts of bolts, screws, and screws

Categories:Industry News
Author:
Origin:
Time of issue:2020-12-29 14:11
Views:

(Summary description)In life, bolts, screws, screws, etc. are often mentioned. What is the difference between them? In fact, the standard statement is that there are no screws and nuts. Screws are commonly known, and those with external threads can be called "screws". The shape of the nut is usually hexagonal, and the inner hole is an internal thread, which is used to cooperate with the bolt and tighten the related parts. The nut is commonly called, and the standard should be called "nut".

What is the difference between the three concepts of bolts, screws, and screws

Categories:Industry News
Author:
Origin:
Time of issue:2020-12-29 14:11
Views:

Information

In life, bolts, screws, screws, etc. are often mentioned. What is the difference between them? In fact, the standard statement is that there are no screws and nuts. Screws are commonly known, and those with external threads can be called "screws". The shape of the nut is usually hexagonal, and the inner hole is an internal thread, which is used to cooperate with the bolt and tighten the related parts. The nut is commonly called, and the standard should be called "nut".

The head of the bolt is generally hexagonal, and the shank has an external thread. The screw is small, the head has a flat head, a cross head, etc., and the rod has an external thread. The actual stud should be called "double-ended stud", both ends have external threads, and the middle is generally a polished rod. The long end of the thread is used to connect to the deep hole, and the short one is connected to the nut. Standard fasteners are divided into twelve categories. The selection is determined according to the use occasion and function of the fastener.

1. Bolt

Bolts are widely used in detachable connections in mechanical manufacturing, and are generally used in conjunction with nuts (usually plus a washer or two washers).

2. Nut

3. Screw

The screw is usually used alone (sometimes with a washer), usually for tightening or tightening, and should be screwed into the internal thread of the body.

4. Stud

Studs are mostly used to connect one of the connected parts with a large thickness and need to be used where the structure is compact or the bolt connection is not suitable due to frequent disassembly. Studs are generally threaded at both ends (single-end studs are threaded at one end). Usually one thread is firmly screwed into the body of the component, and the other end is matched with a nut to play the role of connection and fastening. To a large extent, it also has a fixed distance function.

5. Wood screws

Wood screws are used to screw into wood to connect or fasten.

6. Self-tapping screws

The working screw hole matched with the self-tapping screw does not need to be tapped in advance, and the internal thread is formed while the self-tapping screw is screwed in.

7. Washers

Anti-loosening washer

The washer is placed between the supporting surface of bolts, screws, nuts, etc. and the supporting surface of the workpiece to prevent loosening and reduce the stress on the supporting surface.

Lock washer

8. Retaining ring

The retaining ring is mainly used to position, lock or stop the parts on the shaft or in the hole.

Industrial Meson

9. Pin

Pins are usually used for positioning, can also be used to connect or lock parts, and can also be used as overload shearing elements in safety devices.

10. Rivets

The rivet has a head at one end, and the shank has no thread. When in use, the rod is inserted into the hole of the connected piece, and then the end of the rod is riveted to play the role of connection or fastening.

11. Connection Vice

The connection pair is a combination of screws or bolts or self-tapping screws and washers. After the washer is installed on the screw, it must be able to rotate freely on the screw (or bolt) without falling off. It is mainly used for tightening or tightening.

Previous: How does the hardware industry remain invincible in the industry?

Next: Screws and nuts prop up Hebei Yongnian's tens of billions industrial chain-bid farewell to "big road goods" and turn to "refinement"

Previous: How does the hardware industry remain invincible in the industry?

Next: Screws and nuts prop up Hebei Yongnian's tens of billions industrial chain-bid farewell to "big road goods" and turn to "refinement"

Related News:

The importance of hardware in doors and windows

Window stays, hinges, handles, buttons and other hardware in doors and windows are probably ignored by many people, but the quality of the hardware will completely affect the normal use of doors and windows. How do they affect it?

→

Hardware common sense: screw strength torsion test

Screw strength test: 1. Turning force test: The twisting force of a product shows its ability to resist being twisted in half. Various standards have minimum requirements for the torsion force of self-tapping screws. In this test, the screw is clamped in a chuck with a tapped middle part on the torsion test tool, and then a torque wrench is used to apply force until the screw is twisted. If the torque does not exceed the minimum requirement, the product is unqualified. Unqualified indicates that the screw is too soft or the thread diameter is too small. 2. Locking test: This test is to lock the screw to a test board, this board has the specified hardness, thickness and aperture. If the screw is locked through the test board, but the thread is deformed, the product is not qualified. Unqualified indicates that the surface hardening treatment of the screw is too shallow or too soft. 3. Locking torque test: This test is only required for the screw rolled by the screw. When the lock test is performed, the minimum lock torque of the test board is observed. If the torque exceeds the specified standard value (the standard value is based on the size of the screw and the surface treatment), the product is not qualified. Unqualified shows that the surface of the screw does not have enough lubricity, or the thread is formed improperly and requires more torque.

→

Basic knowledge of Phillips screwdriver specification selection

Phillips screwdrivers generally have 7 specifications from small to largest ph000 ph00 ph0 ph1 ph2 ph3 ph4 The approximate relationship between the diameter of the screwdriver shaft and the specifications: 4mm~4.5mm rods generally do cross Ph1, which can cover ph000 ph00 ph0 ph1 This series is basically a precision series, disassembly and assembly of small electronic devices, glasses, watches, radios, tape recorders, etc.. Must! This is mainly a set, of which ph000 is very small, not a lot of use The 6mm rod is generally used for the Phillips Ph2 specification. This is the most commonly used specification in the medium-sized screwdriver, so you can buy one separately and use it for the fastening screws of the display, radio, TV and other housings, transformer fixing, etc. It is also a Ph2 head that makes furniture door screws. The 8mm rod is used for Ph3, and the 10mm rod is used for Ph4. Basically, it may be used in mechanical equipment. It is rarely used in electronic assembly, unless it is used as an electric box controller... So the combination scheme of Phillips screwdriver configuration is roughly: Precision screwdriver set below 4mm rod + a separate Ph2 screwdriver If you consider that the handle of the suit is too thin to focus on, you can also configure a Ph1 screwdriver separately. It is not a problem if it is not configured. Nothing is too particular about a word There are many types of star batches, and the general suits start from T6, but some modern mobile phones have the smallest use of T5, so generally suit + T5 can hit the world. About the material experience: From lowest to highest Medium carbon steel-high carbon steel-crv- S2- S2 plus titanium oxide coating-S2 plus diamond coating. For example, wera's most high-end Beatles can increase friction after using diamond coating without increasing the force or slipping screws.

→