DIN7504 Phil Recessed Shallow Flange Head Self-Drilling Tapping Screws

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Product Description:

Product Description

Product Name

DIN7504 Phil Recessed Shallow Flange Head Self-Drilling Tapping Screws

Material

Carbon Steel, Stainless Steel 201/ 304/ 316  or others.

Size

8#-18*13 ~  14#-14*125

Standard Model

DIN ANSI JIS ASTM

Min Order

1000piece/ pieces


Packaging & Shipping

Packing

Inner Box + Carton Box + Pallet or Under Your Requirement

Supply capacity

10000000 piece/ pieces per month

Delivery time

5~20  days after deposit

Export market

Asia, America, Europe, Africa, markets.


Our Services

1. Reliable Supplier

2. High Quality

3. Standard Producing Technology

4. Competitive Factory Price

5. Fast Delivery


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Q:Is the tail screw? If it is mainly used in what place? If not what are they different?
Yes, can be directly set in the material, the basic material on the drilling, mainly used in the steel structure of the color steel tile can also be used for simple construction of thin plate fixed.
Q:Bolts and other connection fasteners some points A B C grade what it means
Bolts and other fasteners connected due to a wide range of applications, the product level requirements are different, so the bolt product grade is divided into A, B, C three grades. One of the most accurate A, C level of the most inaccurate, B between the two. Class A is used for important applications where assembly accuracy is high and subject to greater impact, vibration or variable loads. Class A for d = 1.6-24mm and l ≤ 10d or l ≤ 150mm bolts. B grade for d> 24mm or l> 10d or l ≥ 150mm bolts, thin rod B grade M3-M20 hexagonal flange bolts, anti-loose performance better. Class C is between M5 and M64.
Q:How do I install the screws correctly?
Expansion screw installation method to expand the screw on the ground or wall holes in the hole, with a wrench to tighten the nuts on the expansion bolts, bolts to go out, while the outside of the metal sleeve is not moving, so the bolt under the bulk of the metal Set up to keep it full of holes, this time, the expansion of the bolt on the expansion of the expansion screw is to make the duct support, hanging, bracket fixed to the wall, the floor, the column used in a special thread connection Pieces. Consists of countersunk head bolts, expansion tubes, flat washers, spring mats and hex nuts. When used, you must first use the impact of electric drill (hammer) in the fixed body on the corresponding size of the hole, then the bolt, expansion tube into the hole, tighten the nut to bolts, expansion tube, the installation and expansion between the fixed body Tight into one. Expansion of the expansion of the principle of expansion of screws is to use the pull out of the slope to promote the expansion of friction caused by clamping force, to achieve a fixed effect. Screw head is a thread, a vertebral. Outside the package of a metal, metal cylinder half of a number of incision, put them together thrown into the hole in the wall, and then lock the nut, Luo mother pull out the screw, the vertebral pull into the metal cylinder, metal cylinder was Open up, so tightly fixed on the wall, generally used for fence, rain Peng, air conditioning and other cement, brick and other materials on the fastening. But its fixation is not very reliable, if the load has a greater vibration, may be loose, it is not recommended for the installation of ceiling fans and so on.
Q:Screw hole slip wire how to do?
Slippery wire that has been broken thread, once the damage is not possible to repair
Q:What is a self-tapping nail? Is it used? What are the characteristics of the shape? What is the difference with ordinary screws?
Compared with the common screw thread, in the same large diameter, the pitch is small and small diameter is slightly smaller, has been standardized. Self-tapping screw material can be divided into two kinds of carbon steel and stainless steel, carbon steel materials which are usually used in 1022 medium carbon steel. Usually used in doors and windows, metal. The head is the end of the end of the shape of the part of the formation of the formation of the surface.For thread forming and thread cutting self-tapping screws (self-tapping screws), the flat top buried, flat round countersunk, pan head, hexagonal and hexagonal wire Head of the most important, these five head type accounted for almost all 90% of self-tapping screws, the use of self-tapping screws (self-tapping screws) should first consider this.
Q:Why do some nuts and washers, and some nuts without washers
If the diameter of the screw and the diameter of the fixed parts of the hole size difference is relatively large, if not washers, nuts and parts of the contact area is relatively small, it is necessary to increase the contact area of the gasket. In addition, the pressing oblong hole, also need to add washer. The same reason is to increase the contact area, making the connection more reliable.
Q:Are there categories of fasteners classified by material?
According to the use of different materials, fasteners are divided into carbon structural steel fasteners, alloy structural steel fasteners, stainless steel fasteners, high temperature alloy fasteners, aluminum alloy fasteners, titanium fasteners, titanium Niobium alloy fasteners and non-metallic fasteners.
Q:The screw is too tight not how to do it
Look at the picture that the screw is not damaged, it may be removed. First of all, be sure to use the appropriate six-way wrench, can not use a common font and cross-shaped screwdriver. Second, with the heating method to remove, from the picture point of view around the screw are metal structure, with alcohol torch heating or high-power electric iron local heating, softening the plastic, hot disassembly, should be able to remove.
Q:What is the difference between Chinese-made screws and US screws?
China-made screws are metric, American screws are American Standard or British
Q:I would like to ask the car transmission inside the thrust washer (thrust washer) is used to do ah?
Differential gear thrust washer is composed of silver alloy pressing, as well as plastics. Planetary gear thrust washer and half axle gear thrust washer shape are concave spherical and planar surface, there are many patterns like grooves or concave point in oil storage. The washer is the role of the friction reducing gear and axial differential housing, improve the transmission efficiency of the differential protection shell, thrust face not excessive wear, to prolong the service life of the differential housing, and maintain the normal meshing and transmission differential gear. The reason for the failure of the thrust washer is a serious lack of lubricating oil, or because of the small size of the stay and the erosion. Planetary gear broken, cross shaft fracture caused by the thrust washer damage, is generally rare. When the vehicle is traveling on a special road, or when the vehicle is in the mud, the differential frequency is used, resulting in excessive wear and thinning of the thrust washer. Thrust washer wear will make gear thrust surface shell, thrust surface acceleration loss, the differential gear axial shift, gear meshing clearance increases, the transmission space increases, causing the gear, cross shaft, differential housing bearing seat hole damage. Thus, the thrust washer is a reliable guarantee of differential action, but also to extend the life of differential parts. To this end, the vehicle should be updated on a regular basis when the thrust washer, to restore its proper clearance, to ensure the normal operation of the differential.

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