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Good quality Cone Point Set Screw - Bulge Head DIN Yulongjian Bulk and Box Package Coarse Thread Drywall Screw – Xinruifeng

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owing to fantastic assistance, a variety of high quality goods, aggressive rates and efficient delivery, we love a very good popularity among our customers. We are an energetic firm with wide market for Set Screw Bolt, Chipboard Screws Sizes, Self Drilling Security Screws, The principle of our company is to provide high-quality products, professional service, and honest communication. Welcome all friends to place trial order for creating a long-term business relationship.
Good quality Cone Point Set Screw - Bulge Head DIN Yulongjian Bulk and Box Package Coarse Thread Drywall Screw – Xinruifeng Detail:

Drywall screw:

1. Heat treatment: It is a method of heating steel to different temperatures and then using different cooling methods to achieve different purposes of changing the properties of steel. The commonly used heat treatments are: quenching, annealing, and tempering. What kind of effects will these three methods produce?

2. Quenching: A heat treatment method in which the steel is heated to above 942 degrees Celsius to make the steel crystals in austenitic state, and then immersed in cold water or cooling oil to quench to make the steel crystals in a martensitic state. This method can increase the strength and hardness of the steel. There is a very big difference in the strength and hardness of the steel with the same label after quenching and without quenching.

3. Annealing: A heat treatment method in which the steel is also heated to an austenitic state and then naturally cooled in air. This method can reduce the strength and hardness of the steel, improve its flexibility, and facilitate processing. Generally, steel will go through this step before processing.

4.  Tempering: Whether it is quenched, annealed or press-formed, steel will generate internal stress, and the imbalance of internal stress will affect the structure and mechanical properties of the steel from the inside, so a tempering process is required. The material is kept warm continuously at a temperature of more than 700 degrees, its internal stress is changed and then cooled naturally.

Bulge Head DIN Yulongjian Bulk and Box Package Coarse Thread Drywall Screw2
Bulge Head DIN Yulongjian Bulk and Box Package Coarse Thread Drywall Screw4
Bulge Head DIN Yulongjian Bulk and Box Package Coarse Thread Drywall Screw3

Size(mm) Size(inch) Size(mm) Size(inch) Size(mm) Size(inch) Size(mm) Size(inch)
3.5*13 #6*1/2 3.5*65 #6*2-1/2 4.2*13 #8*1/2 4.2*102 #8*4
3.5*16 #6*5/8 3.5*75 #6*3 4.2*16 #8*5/8 4.8*51 #10*2
3.5*19 #6*3/4 3.9*20 #7*3/4 4.2*19 #8*3/4 4.8*65 #10*2-1/2
3.5*25 #6*1 3.9*25 #7*1 4.2*25 #8*1 4.8*70 #10*2-3/4
3.5*29 #6*1-1/8 3.9*30 #7*1-1/8 4.2*32 #8*1-1/4 4.8*75 #10*3
3.5*32 #6*1-1/4 3.9*32 #7*1-1/4 4.2*34 #8*1-1/2 4.8*90 #10*3-1/2
3.5*35 #6*1-3/8 3.9*35 #7*1-1/2 4.2*38 #8*1-5/8 4.8*100 #10*4
3.5*38 #6*1-1/2 3.9*38 #7*1-5/8 4.2*40 #8*1-3/4 4.8*115 #10*4-1/2
3.5*41 #6*1-5/8 3.9*40 #7*1-3/4 4.2*51 #8*2 4.8*120 #10*4-3/4
3.5*45 #6*1-3/4 3.9*45 #7*1-7/8 4.2*65 #8*2-1/2 4.8*125 #10*5
3.5*51 #6*2 3.9*51 #7*2 4.2*70 #8*2-3/4 4.8*127 #10*5-1/8
3.5*55 #6*2-1/8 3.9*55 #7*2-1/8 4.2*75 #8*3 4.8*150 #10*6
3.5*57 #6*2-1/4 3.9*65 #7*2-1/2 4.2*90 #8*3-1/2 4.8*152 #10*6-1/8

Q1: Are you trading company or manufacturer?
A1: We are the manufacturer. We also have our professional Foreign Trade Team for servicing you. We provide 7×24 hours real-time video verification factory service.

Q2: What is your terms of payment ?
A2: 30%T/T in advance ,balance before shipment. And we also can accept L/C at sight payment terms.

Q3. Can you provide a sample?
A3: Yes, We can supply sample at free charge, but not including Express charge.

Q4. Can you provide Test Report?
A4: Yes, we can provide Factory Test Report for you at free charge from our company. And you also can afford cost to ask the Thirty Party like SGS, BV etc to Test your order before shipping.

Q5: Can you provide Technical support and After sales service?
A5: Yes, we can provide you the supply chain solution for Fastener products and We provide you the technical solution for Fastener Equipment. We also provide you the after sales service.

Q6: How do we can know more information for your factory?
A6: You can follow our YouTube, Linkedin, Facebook, Twitter, WeChat, and Whatsapp etc because we continuously updates video about our company. You also can directly see our factory via Live Video of Skype,WeChat etc at working time.

Q7: How do we contact you?
A7: You can contact us via Email, also can via WeChat, Whatsapp, Skype, Made-in-China Message and Phone etc at your any time.

Q8: Can you finish customs clearance for order?
A8: Yes, we can finish Export customs clearance for your order in our country.


Product detail pictures:

Good quality Cone Point Set Screw - Bulge Head DIN Yulongjian Bulk and Box Package Coarse Thread Drywall Screw – Xinruifeng detail pictures

Good quality Cone Point Set Screw - Bulge Head DIN Yulongjian Bulk and Box Package Coarse Thread Drywall Screw – Xinruifeng detail pictures

Good quality Cone Point Set Screw - Bulge Head DIN Yulongjian Bulk and Box Package Coarse Thread Drywall Screw – Xinruifeng detail pictures

Good quality Cone Point Set Screw - Bulge Head DIN Yulongjian Bulk and Box Package Coarse Thread Drywall Screw – Xinruifeng detail pictures

Good quality Cone Point Set Screw - Bulge Head DIN Yulongjian Bulk and Box Package Coarse Thread Drywall Screw – Xinruifeng detail pictures


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continue to enhance, to be certain solution top quality in line with market and buyer standard requirements. Our corporation has a excellent assurance program are actually established for Good quality Cone Point Set Screw - Bulge Head DIN Yulongjian Bulk and Box Package Coarse Thread Drywall Screw – Xinruifeng, The product will supply to all over the world, such as: Swiss, Israel, Bangkok, Our products have mainly exported to south-east Asia Euro-America, and sales to all of our country. And depending on excellent quality, reasonable price, best service, we have got good feedback from customers overseas. You are welcomed to join us for more possibilities and benefits. We welcome customers, business associations and friends from all parts of the world to contact us and seek cooperation for mutual benefits.
  • The company leader recept us warmly, through a meticulous and thorough discussion, we signed a purchase order. Hope to cooperate smoothly
    5 Stars By Alexia from Poland - 2018.12.22 12:52
    This is the first business after our company establish, products and services are very satisfying, we have a good start, we hope to cooperate continuous in the future!
    5 Stars By Helen from Peru - 2017.06.29 18:55

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