• M4X25 White Zinc Plated Phillips Pan Head Self Tapping Screw System 1
  • M4X25 White Zinc Plated Phillips Pan Head Self Tapping Screw System 2
  • M4X25 White Zinc Plated Phillips Pan Head Self Tapping Screw System 3
M4X25 White Zinc Plated Phillips Pan Head Self Tapping Screw

M4X25 White Zinc Plated Phillips Pan Head Self Tapping Screw

Ref Price:
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Loading Port:
Shanghai
Payment Terms:
TT OR LC
Min Order Qty:
50 pc
Supply Capability:
50000 pc/month

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1,Specification

Standard

GB, DIN, ISO, ANSI, ASME, IFI, JIS,BSW,AS,Q,HJ,

Size

According to your request 

Materials

1,Stainless Steel: SUS201,SUS302,SUS303, SUS304, SUS316, SUS410, SUS430

2,CarbonSteel:C1006,C1008,C1010,C1018,C1022,C10B21,C10B33,C1035,C1045,

C435#,40CrMo,42CrMo

3,Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200CuZn37), C28000(CuZn40)

4,Bronze: C51000, C52100, C54400, etc

5,Aluminum: Al6061, Al6063 etc

Aluminum Alloy: Al6061, Al6063 etc

6,Titanium and Titanium Alloy: TAD,TA1-TA8,TB2,TC1-TC10

7,Alloy steel: SCM435,C10B21,C10B33

8,Iron:1213,12L14,1215,ect

Surface treatment

  • Bronze,Bronzy,red bronze, Chrome plate,color painted ,Nylok,ruspert,Magni,,Absorber Oil,Hardened,phosphate(blackGray),Black,Zinc Plated,(green,blackwhite blue , Yellow ,ROHS), Rainbow ,Plain, Nickel(black,white),Electrophoresis, Dacromet,

2:Business terms

Report

SGS,ROHS,

Trade terms

EXW, FOB,CIF,CFR

Packing

Packing: Poly bag, Small box, Plastic box, Carton, Pallet 25kgs/ carton, 36 cartons/ pallet. Carton dimension: 39cm*28cm*13.5cmpallet dimension: 100cm*100cm*80according to the customer’s requirement

Payment terms

TT 30% deposit in advance, 70% Balance Before shipment,

100% LC at sight,Western Union. 

 

Sample terms

Sample free offered if available in stock,otherwise there will be sample charge


Quality Certification

SGS,ROHS,

ISO9001:2008, ISO14001:2004

quality system

100% of full line testing system, keep with the international standard

Inspection equipment

Caliper, Microcline, Torsion meterSalt atmosphere testing machineRing gauge, General gage, sclerometer, Projector, die gage, image screening instrument



3,products show 

M4X25 White Zinc Plated Phillips Pan Head Self Tapping Screw

M4X25 White Zinc Plated Phillips Pan Head Self Tapping Screw

M4X25 White Zinc Plated Phillips Pan Head Self Tapping Screw


Q: What is the meaning of the screw and the 4 and 8?
Screw should be written on the 4.8 bar, 4.8 on behalf of the strength level
Q: Screw M is mechanical teeth, tapping is what?
Self-tapping is a pointed screw for connection with no internal thread, such as plastic parts, wood parts, stone, etc.
Q: Also known as screw nails, I want to nail on the board, but there is no way to nail into the hard, how nail?
Wood must use a self-tapping screwdriver, if it is a common machine above the screws can not be nailed to the board above, if the wood is relatively hard, it is recommended to use a drill above the board to play a smaller hole than the self- , So more effort
Q: What is a self-tapping nail? Is it used? What are the characteristics of the shape? What is the difference with ordinary screws?
Self-tapping screw head shape with round head, flat head, semi-countersunk head and countersunk head and so on. Materials generally carburized steel, heat treatment after the surface hardness of not less than 45HRC.
Q: How to look at screw models
That is, there are certain specifications of the national standard, such as: M6, M8, M10, M12, M16, M20. Which 7911131415171819 there is no. Wrench it as such as: M6 wrench, M16 wrench and so on.
Q: What is the invention of the screw?
Certainly is the invention of foreigners, specifically who do not know.
Q: Inside the hexagonal screws, rather not down, it may be too much screw on the screw too tight has been bad 3 screwdriver screw is too small also one-half of rice grain please help think about ways
First engage in a rust or diesel under the bubble. Then T-type wrench twist. (Own do)
Q: Engineering argument, usually referred to as the M3 screw, M refers to what is the meaning? The Please instruct the engineering staff.
M: ordinary thread;: screw that thread diameter (ie, the top of the thread) is 3mm, nuts that thread diameter
Q: How is the screw produced
Annealing: the wire heated to the appropriate temperature, to maintain a certain time, and then slowly cooling to adjust the crystal structure, reduce hardness, improve the room temperature processing. Pickling: Remove the oxide film on the surface of the wire and form a layer of phosphate film on the metal surface to reduce the wire drawing and cold pier or forming process. To the required diameter. Practical for some products can be divided into coarse pumping (shelling) and fine pumping two stages. Molding: The wire is forged by cold forging (or hot forging) to achieve the shape and length (or thickness) of the finished product. The finished semi - finished product is rolled or tapped to achieve the desired thread. Practical for the bolt (screw) known as the rolling teeth, teeth known as the rolling teeth, nuts called tapping. Heat treatment: according to the object and the purpose of different different heat treatment can be used. Quenched and tempered steel: quenched high temperature tempering (500-650 ℃) spring steel: quenched after tempering temperature (420-520 ℃) ??carburizing steel: carburizing after quenching and then low temperature tempering (150-250 ℃) low carbon and In the carbon (alloy) steel quenched into martensite, with the tempered temperature rise, the general rule is the strength decreased, while the plasticity, toughness rise. Surface treatment: surface treatment that is through a certain method in the workpiece surface coating process, the purpose is to give the product surface appearance, anti-corrosion effect.
Q: What is the size of the screw for the wall power switch installation
Concealed switch generally M5 × 30 semi-round head screws, you can also use M4 × 30 tapping screws. Ming installed switch is used M5 expansion with M5's self-tapping screws.

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