A finned tube is a heat transfer device consisting of many parallel metal fins commonly used for heat dissipation and cooling applications. Finned tubes increase the surface area of the pipe, thus increasing the heat transfer efficiency. Finned tubes are commonly used in applications such as air coolers, automotive radiators, condensers, and evaporators. They are also used in industrial heaters and refrigerators to increase heat transfer surface area and improve efficiency.
Finned tube is a kind of new, wear-resistant, efficient heat exchange material, is a kind of energy-saving heat exchange element, it uses high-frequency power source as heat source, the steel strip, steel pipe heating at the same time, so that the fusion welding together into one, with high heat exchange efficiency, large cooling area, long service life, adapt to a wide range of temperature, high pressure characteristics, it can also be made of a variety of materials, Excellent heat transfer, durability, heat resistance and corrosion resistance. Widely used in waste heat recovery, petrochemical, power plant boiler, economizer, bus, industrial and civil construction heating, refrigeration, medical drying, wood drying, food drying system and other industries.
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.
Finned Tubes,Heat Exchange Finned Tube,Finned Tube Heat Exchanger,Heat Exchange Spiral Finned Tube Jiangsu Gelan Environmental Technology Co., LTD , https://www.glkj2010.com
1> Description: Stainless Steel Screw SS410 Hex Washer Head Self Drilling Screw Â
2> Material:Â Stainless Steel 410
3> Surface: Passicvated
4> Size: 2.5mm (#6) up to 6.3mm (#14)
5> Length: Up to 150mm (6 Inch)
6> Head style: Hex Washer Head ......
7> Drive size: No ......
8> Packing: Bulk packing, box packing & to customer's requested.
Lockey Industrial Produce the screw include Self Drilling Screw, Self Tapping Screw(Sheet Metal Screw), Drywall screw, Chipboard screw, Roof screw, machine screw, wood screw, plastic screw...
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 propertiesÂ
and MaterialAs specified in DIN 267 part 12
Limit deviationsÂ
geometrical toleranceProduct grade A as specified in ISO 4759 part 1
ISO 4759 Part 1
Surface finish
As processedÂ
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 is Lockey?
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 do Lockey produce?
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 do 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
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
Stainless Steel Screw SS410 Hex Washer Head Self Drilling Screw  Â
1> Description: Stainless Steel Screw SS410 Hex Washer Head Self Drilling Screw Â
2> Material:Â Stainless Steel 410
3> Surface: Passicvated
4> Size: 2.5mm (#6) up to 6.3mm (#14)
5> Length: Up to 150mm (6 Inch)
6> Head style: Hex Washer Head ......
7> Drive size: No ......
8> Packing: Bulk packing, box packing & to customer's requested.
Lockey Industrial Produce the screw include Self Drilling Screw, Self Tapping Screw(Sheet Metal Screw), Drywall screw, Chipboard screw, Roof screw, machine screw, wood screw, plastic screw...
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 propertiesÂ
and MaterialAs specified in DIN 267 part 12
Limit deviationsÂ
geometrical toleranceProduct grade A as specified in ISO 4759 part 1
ISO 4759 Part 1
Surface finish
As processedÂ
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 is Lockey?
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 do Lockey produce?
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 do 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
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
Stainless Steel Screw Ss410 Hex Washer Head Self Drilling Screw
Model NO.: LKSH
Grade: to Standard
Market: Global
Sample: Free (If in Store)
Optional Material: Stainless Steel, Carbon Steel, Alloy Steel, Brass
Optional Finish: Passivated, Zinc, HDG, Magni, Geomet
Optional Size: 2.5mm (#6) to 6.3mm (#14), Length to 150mm (6")
Trademark: LK
Transport Package: Bulk Packing, Small Box Packing
Specification: DIN, ANSI, ISO, JIS and Non-Standard
Origin: China
HS Code: 7318
Model NO.: LKSH
Grade: to Standard
Market: Global
Sample: Free (If in Store)
Optional Material: Stainless Steel, Carbon Steel, Alloy Steel, Brass
Optional Finish: Passivated, Zinc, HDG, Magni, Geomet
Optional Size: 2.5mm (#6) to 6.3mm (#14), Length to 150mm (6")
Trademark: LK
Transport Package: Bulk Packing, Small Box Packing
Specification: DIN, ANSI, ISO, JIS and Non-Standard
Origin: China
HS Code: 7318
Stainless Steel Screw SS410 Hex Washer Head Self Drilling Screw  Â