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Material: | Carbon Steel / 316Â or 304Stainless Steel |
Standard: | ISO,DIN,GB,BS,JIS,ANSI. |
Production Capacity: | 500000pieces per month |
Surface Treatment: | zinc-plate,galvanize,color zinc plate,nickel plated,Cr plated,hot -galvanize. |
Grade: | 4.8,6.8,8.8,10.9, 12.9, A2-50, A2-70 |
Size: | M5-M36 |
Delivery Time: | 30-40Days |
Packaging: | Cartons&pallets or according to customer's requirement |
For finishing, we provide black oxide, zinc electroplating, phosphate, mechanical galvanization, hot dip galvanization, dacromet and other kinds. The products are produced in conformity with DIN, ANSI, AS, BS, JIS, GB, ISO or nonstandard specificatons or against customers' requirements.



We are able to provide all kinds of mechanical parts, like die-casting parts, investment casting parts, sand casting parts, precision casting parts, hot/cold forging parts, CNC machining parts and plastic injection parts. Product range includes housing, gear, worm-gear, gearbox, shaft, worm shaft, bolt, cover, hub, screw, valve, bush, wheel, coupling, etc. We have passed the ISO9001:1995 certificate and met ROHS requirements.
We have maintained a long-term stable cooperation with our customers with excellent technology and strict quality control, we will provide added value service to ensure the product's function and save cost, we can put forward many constructive suggestions in accordance with our customer's drawing files and the function of the customer requirements.
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We are looking forward to your positive enquiry!
Baoding XinlongTongda Trade Co., Ltd.
No.304 Business Shop, Yinxing Road, Baoding City, Hebei, China.
Tel: 0086-312-3331206-815
Fax: 0086-312-3331102
Mobile: 0086-15232244483
Web: www.synlone.com
Http://synlone.en.made-in-china.com
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 High Quality Carbon Steel U-Bolt
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Material: | Carbon Steel / 316Â or 304Stainless Steel |
Standard: | ISO,DIN,GB,BS,JIS,ANSI. |
Production Capacity: | 500000pieces per month |
Surface Treatment: | zinc-plate,galvanize,color zinc plate,nickel plated,Cr plated,hot -galvanize. |
Grade: | 4.8,6.8,8.8,10.9, 12.9, A2-50, A2-70 |
Size: | M5-M36 |
Delivery Time: | 30-40Days |
Packaging: | Cartons&pallets or according to customer's requirement |
For finishing, we provide black oxide, zinc electroplating, phosphate, mechanical galvanization, hot dip galvanization, dacromet and other kinds. The products are produced in conformity with DIN, ANSI, AS, BS, JIS, GB, ISO or nonstandard specificatons or against customers' requirements.



We are able to provide all kinds of mechanical parts, like die-casting parts, investment casting parts, sand casting parts, precision casting parts, hot/cold forging parts, CNC machining parts and plastic injection parts. Product range includes housing, gear, worm-gear, gearbox, shaft, worm shaft, bolt, cover, hub, screw, valve, bush, wheel, coupling, etc. We have passed the ISO9001:1995 certificate and met ROHS requirements.
We have maintained a long-term stable cooperation with our customers with excellent technology and strict quality control, we will provide added value service to ensure the product's function and save cost, we can put forward many constructive suggestions in accordance with our customer's drawing files and the function of the customer requirements.
Â
We are looking forward to your positive enquiry!
Baoding XinlongTongda Trade Co., Ltd.
No.304 Business Shop, Yinxing Road, Baoding City, Hebei, China.
Tel: 0086-312-3331206-815
Fax: 0086-312-3331102
Mobile: 0086-15232244483
Web: www.synlone.com
Http://synlone.en.made-in-china.com
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P-n junction terminal voltage constitute a certain potential barrier, when the positive bias voltage drop time base, P and N the majority carrier diffusion to the other party.Due to the electron mobility is much bigger than hole mobility, so there will be a large number of electronic spreading P area, constitute of P area of minority carrier injection.These electrons and valence with hole composite, composite when the energy in the form of light energy to release out.This is the principle of PN junction glow.
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