1> Description:Â Double Flat Head Chipboard Screw
2> Material: Steel
3> Surface: Zinc Plated
4> Size: 2.5mm (#6) up to 6.3mm (#14)
5> Length: Up to 300mm (12 Inch)
6> Head style: Double Flat Head......
7> Drive size: Pozi
8> Packing: Bulk packing, box packing & to customer's requested.






The main products include Machine screw, chipboard screw, drywall screw, self tapping screw(Sheet Metal Screw), Self drilling Screw, Concrete screw, Furniture screw(Connecting Bolt), Plastic screw, Deck Screw, wood screw Etc.
If you are interesting our products, please do not hesitate to contact us, then we could quote our best price as soon as get from you.
Technical Delivery Conditions | ||||
Material | Steel | Stainless steel | ||
General requirements | As specified in DIN 267 part 1 | |||
Screw thread and thread ends | As specified in DIN 7970 | |||
Cross recesses | As specified in DIN 7962 | |||
Mechanical properties and Material |
As specified in DIN 267 part 12 | |||
Limit deviations geometrical tolerance |
Product grade A as specified in ISO 4759 part 1 | |||
ISO 4759 Part 1 | ||||
Surface finish | As processed | Bright | ||
DIN267 Part 2 shall apply with regard to surface roughness | ||||
DIN267 Part 19 shall apply with regard to permissible surface discontinuities | ||||
DIN267 Part 9 shall apply with regard to electropiating | ||||
Other type of surface protaction being suject to agreement | ||||
Acceptance inspection | DIN267 Part 5 shall apply with regard to acceptance inspection |
Q&A
Who Lockey is?
A fastener manufacture founded in 1973. Dragon Iron Group devotes itself to the manufacture and sales of fasteners, hardware parts, forging and machine parts for Auto and other industries.Â
Dragon Group has its headquarter, Dragon Iron Enterprise, in A Lien, Taiwan.Â
Lockey Industrial Co., Ltd. set up in 2003 in Dongguan City to be the Foreign Sales Department of the group. Our plant was established in Jingjiang City. In that way, we can easily export our products .Â
Â
What Lockey does?
As a fastener manufacture, we mainly produce including, but not only:Â
1. Bolt, studs, and thread rods...Â
2. Hex nut, nylon nut, flange locknut...
3. Tapping screw, drilling screw, wood screw, machine screw, socket cap screw...
4. Plain washer, spring washer, tooth washer...
5. Structural applications, ASTM A325/A490, ASTM F1852/2280, DIN6914/5/6, DIN7990... Â
Meanwhile, special fasteners, hardware parts, forging and machine parts for Auto are also in our range. We make parts for Toyota, Honda.
70% of our products are exported.
Â
Why Lockey?
Lockey never stops doing one thing: INNOVATE. Innovation is the permanent power for the development of Lockey. Technology innovation and concept innovation, keep Lockey going well and going further. Meanwhile, Lockey gathered a group of talents who good at management and co-operation. Go and contact with these professional man, you will get a satisfied result. Â Â
We are glad that you choose Lockey as your supplier, but Lockey more than a supplier. We are partner. We do not only sell, we share. Share the newly info of fastener, price trend...we also share profit.
We are friend. We do not only care our sales, but also yours; and the quality in using.Â
Â
What Lockey do to assure the quality?
As a over 40 years experience in fastener manufacture with ISO9001 certificate, we meet difficulties or problems, and we solve them all ways. Lockey set up a quality assurance system according to ISO9001 with the 40 years experience. Criteria were made on factors that may effect the quality. 80% of our staff are skilled, and have worked in Lockey for more than 5 years, employee have to take skill class on/off work for weeks. All of these is to guide our worker how to prevent and handle an issue.
Â
Do Lockey produce non-standard item?
Yes, we do. Send your specification drawings to our sales representative, then you will get a quotation.
Â
Do lockey have a published price list?
We do NOT have a published price list. In our business market conditions are always fluctuating, which makes standard pricing difficult to maintain. We allow our sales staff to be flexible when it comes to quoting on your requirements, which means that you will receive the best pricing available when you need it.
Â
Do Lockey offer a discount?
Of course. we can offer you a discount base on your large quantity. But at the same time, like what we said above, we believe our sales staff have offered you the best price. In that way, you may have a discount, but not a big one. Go and explore for it.
Â
Do Lockey provide samples?
Why not, and stored samples are totally free. What we are going to tell you is that we do NOT have budget for Express.Â
Â
What's the delivery time?
It depends on your order quantity. It is about 20-40 days for standard ones, 35-60 days for non-standard ones. Check it with sales representative, he/she will give a accurate date of shipment. Â Â
Â
What is the payment term?
T/T & L/C are the prefer payment term. Also Western-Union is acceptable for low value payment, like samples' Express fee. Double Flat Head Chipboard Screw
1> Description:Â Double Flat Head Chipboard Screw
2> Material: Steel
3> Surface: Zinc Plated
4> Size: 2.5mm (#6) up to 6.3mm (#14)
5> Length: Up to 300mm (12 Inch)
6> Head style: Double Flat Head......
7> Drive size: Pozi
8> Packing: Bulk packing, box packing & to customer's requested.






The main products include Machine screw, chipboard screw, drywall screw, self tapping screw(Sheet Metal Screw), Self drilling Screw, Concrete screw, Furniture screw(Connecting Bolt), Plastic screw, Deck Screw, wood screw Etc.
If you are interesting our products, please do not hesitate to contact us, then we could quote our best price as soon as get from you.
Technical Delivery Conditions | ||||
Material | Steel | Stainless steel | ||
General requirements | As specified in DIN 267 part 1 | |||
Screw thread and thread ends | As specified in DIN 7970 | |||
Cross recesses | As specified in DIN 7962 | |||
Mechanical properties and Material |
As specified in DIN 267 part 12 | |||
Limit deviations geometrical tolerance |
Product grade A as specified in ISO 4759 part 1 | |||
ISO 4759 Part 1 | ||||
Surface finish | As processed | Bright | ||
DIN267 Part 2 shall apply with regard to surface roughness | ||||
DIN267 Part 19 shall apply with regard to permissible surface discontinuities | ||||
DIN267 Part 9 shall apply with regard to electropiating | ||||
Other type of surface protaction being suject to agreement | ||||
Acceptance inspection | DIN267 Part 5 shall apply with regard to acceptance inspection |
Q&A
Who Lockey is?
A fastener manufacture founded in 1973. Dragon Iron Group devotes itself to the manufacture and sales of fasteners, hardware parts, forging and machine parts for Auto and other industries.Â
Dragon Group has its headquarter, Dragon Iron Enterprise, in A Lien, Taiwan.Â
Lockey Industrial Co., Ltd. set up in 2003 in Dongguan City to be the Foreign Sales Department of the group. Our plant was established in Jingjiang City. In that way, we can easily export our products .Â
Â
What Lockey does?
As a fastener manufacture, we mainly produce including, but not only:Â
1. Bolt, studs, and thread rods...Â
2. Hex nut, nylon nut, flange locknut...
3. Tapping screw, drilling screw, wood screw, machine screw, socket cap screw...
4. Plain washer, spring washer, tooth washer...
5. Structural applications, ASTM A325/A490, ASTM F1852/2280, DIN6914/5/6, DIN7990... Â
Meanwhile, special fasteners, hardware parts, forging and machine parts for Auto are also in our range. We make parts for Toyota, Honda.
70% of our products are exported.
Â
Why Lockey?
Lockey never stops doing one thing: INNOVATE. Innovation is the permanent power for the development of Lockey. Technology innovation and concept innovation, keep Lockey going well and going further. Meanwhile, Lockey gathered a group of talents who good at management and co-operation. Go and contact with these professional man, you will get a satisfied result. Â Â
We are glad that you choose Lockey as your supplier, but Lockey more than a supplier. We are partner. We do not only sell, we share. Share the newly info of fastener, price trend...we also share profit.
We are friend. We do not only care our sales, but also yours; and the quality in using.Â
Â
What Lockey do to assure the quality?
As a over 40 years experience in fastener manufacture with ISO9001 certificate, we meet difficulties or problems, and we solve them all ways. Lockey set up a quality assurance system according to ISO9001 with the 40 years experience. Criteria were made on factors that may effect the quality. 80% of our staff are skilled, and have worked in Lockey for more than 5 years, employee have to take skill class on/off work for weeks. All of these is to guide our worker how to prevent and handle an issue.
Â
Do Lockey produce non-standard item?
Yes, we do. Send your specification drawings to our sales representative, then you will get a quotation.
Â
Do lockey have a published price list?
We do NOT have a published price list. In our business market conditions are always fluctuating, which makes standard pricing difficult to maintain. We allow our sales staff to be flexible when it comes to quoting on your requirements, which means that you will receive the best pricing available when you need it.
Â
Do Lockey offer a discount?
Of course. we can offer you a discount base on your large quantity. But at the same time, like what we said above, we believe our sales staff have offered you the best price. In that way, you may have a discount, but not a big one. Go and explore for it.
Â
Do Lockey provide samples?
Why not, and stored samples are totally free. What we are going to tell you is that we do NOT have budget for Express.Â
Â
What's the delivery time?
It depends on your order quantity. It is about 20-40 days for standard ones, 35-60 days for non-standard ones. Check it with sales representative, he/she will give a accurate date of shipment. Â Â
Â
What is the payment term?
T/T & L/C are the prefer payment term. Also Western-Union is acceptable for low value payment, like samples' Express fee.Â
A heat exchanger is a device used to transfer heat, usually to transfer heat from one fluid to another without them mixing. A heat exchanger usually consists of a number of parallel pipes in which one fluid flows through the pipe and another fluid flows through the outside of the pipe. In this way, heat can be transferred from one fluid to another for heating or cooling purposes. Heat exchangers are widely used in many industries, such as chemical, pharmaceutical, food processing, air conditioning and heating systems, etc.
Heat exchanger usually consists of the following components:
1. Heat exchange pipe: Pipe used to transfer heat, usually made of metal materials, such as copper, stainless steel, etc.
2. Heat exchange surface: A surface used to transfer heat, usually consisting of metal sheets or pipes. The greater the surface area, the higher the heat transfer efficiency.
3. Housing: Housing, usually made of metal or plastic, used to secure heat exchange pipes and surfaces.
4. Seals: Seals used to prevent media leakage, usually made of rubber or silicone rubber.
5. Support: A support used to support a heat exchanger, usually made of steel or cast iron.
6. Import and export pipes: pipes used for medium entry and exit, usually made of metal or plastic.
7. Cleaning hole: A hole used to clean the inside of the heat exchanger, usually located on the upper or side of the heat exchanger.
8. Insulation layer: Insulation layer used to keep the temperature of the heat exchanger stable, usually made of glass wool or polyurethane foam.
The main business scope is various heaters, waste heat boilers, pressure vessels, supportingair preheaters, air coolers, furnace accessories and accessories, and provide equipment installation, with EPC ability of projects. At present, our customers have covered all large and medium-sized petrochemical enterprises in China and established long-term strategic cooperative partnership with them. Products are exported to Southeast Asia, Middle East, and other regions.
Heat Exchanger,Tubular Heat Exchanger,Efficiency Tubular Heat Exchanger,Tube In Tube Heat Exchanger
Jiangsu Gelan Environmental Technology Co., LTD , https://www.glkj2010.com