1> Description: Stainless Steel, Alloy Steel, Steel, Brass U Bolt
2> Material: Stainless Steel, Alloy Steel, Steel, Brass
3> Surface: Plain, Zinc, HDG...Passivated
4> Size: M5(3/16") up to M24(1")
5> Length: Up to 200mm
6> Mechanical Properties: Class 5.6, 8.8, 10.9 & Grade 2, 5, 8; A2, A4
7> Packing: Bulk packing and box packing and according to customer's requested then in pallet.





The main products for bolts include U Bolt, Hex. Lag bolt(Coach screw), Hex. Bolt, Carriage bolts, Hex. Socket cap screw, Allen Screw, Hex. Flange bolt, Thread Rod, Square Bolt, Hex. Bolt with nuts and some special bolt per the drawing from the client.
If you are interested in our products, please do not hesitate to contact us, then we could quote our best price as soon as we get from you.
Technical Delivery Conditions | |||||
Material | Steel | Stainless steel | Non-ferrous metal | ||
General requirements | As specified in DIN 267 part 1 | ||||
Thread | Tolerance | 6g | |||
Standard | DIN13 Part 12 & 15 | ||||
Mechanical properties | Property class | 5.6 8.8 10.9 |
≤M20 | A2-70 | Subject to agreement |
A4-70 | |||||
>M20 | A2-50 | ||||
A4-50 | |||||
C3,C4 | |||||
Standard | ISO 898 Part 1 | DIN267 Part 11 | DIN267 Part 18 | ||
Limit deviations geometrical tolerance | Product grade | A for product up to size M24 and L≤10d or 150mm B for product exceeding size M24 or L>10d or 150mm |
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Standard | ISO 4759 Part 1 | ||||
Surface finish | As processed Property class 8.8 and above: Blackened |
Bright | 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 | |||||
DIN267 Part 10 shall apply with regard to hot dip galvanizing | |||||
Acceptance inspection | DIN267 Part 5 shall apply with regard to acceptance inspection |
Who is Lockey?
Full name Lockey Industrial Co., Ltd. A fastener manufacturer 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. http://www.lockey-dg.com/eng_001.htm will show more.
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What do Lockey produce?
As a fastener manufacturer, 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.
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Why Lockey?
Lockey never stop 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
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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.
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Do Lockey produce non-standard item?
Yes, we do. Send your specification drawings to our sales representative, then you will get a quotation.
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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.
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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 have offered you the best price. In that way, you may have a discount, but not a big one. Go and explore for it.
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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
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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
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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
plastic pipe making machine in Pipe Extrusion Machine production line
Plastic pipe making machine application:
Plastic pipe application and usage amount is far ahead in the plastic pipe field,good surface hardness and tensile strength, good anti-aging, high safety factor, it is widely used in electrical cable pipe,water supply pipe,drain pipe, agricultural water supply system, architectural water supply system, pavement of cables etc.
Production line with high efficiency single screw extruder and through the spiral or basket type Mould by multi - Crawler traction machine vacuum sizing cooling and. As is known to all, large-diameter PE pipe are tractive pipe variety, KR specially developed rapid traction switching device, so as to solve the the problem. By the appropriate transformation part of the unit, you can achieve a two-layer or multi-layer co extruded, replacing the extruded layer material or add special materials according to the requirements of the use, such as flame retardant, antistatic, corrosion resistance, nano antibacterial materials, greatly improving the pipe use, reduce raw material consumption, thereby reducing the cost of pipes.
Production line using PLC control system, man-machine dialogue interface, simple operation, stand-alone adjustment, the full board linkage, automatic fault alarm, production and reliable.
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