Specifications

round head bolt/ SS304 SS316
1.Grade: A2, A4
2.Size: M4-M52
3.Finish:passivated

  Stainless steel hex bolt with sus202 304 316 with bolt and nut

 

• ASTM A325 A325M A490 A490M
• ASTM F1852 F2280
• DIN 6914-6916
• DIN EN 14399
• DIN 976
• DIN 912
• DIN 931 933
• ISO 4014 4017
• ISO 7412
• ISO 4762
• ISO 13918
• GB/T 1228~1231
• GB/T 3632
• GB/T 5782 5783
• GB/T 10433
• DIN933
• DIN931
• ASTME B18.2.1
• JIS B 1180
• DIN912
• DIN7991
• DIN913
• DIN914
• DIN915
• DIN916
• JIS B1177
• ISO 4027
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[Quality Assurance]

1)        Use the top grade alloy steel, SS steel ,carbon steel as raw material, through ultrasonic flaw detection, chemical composition analysis, spectroscopic analysis, mechanical property test and spark discrimination detecting, completely rejects any mixed raw material, and keep the material selection complying to Standard requirement.

2)        For the lager size bolts which diameter is more than M36, we have farinfrared temperature measuring and controlling device to make sure the good head forming of larger size bolts. For the bolts which diameter is less than M36(including M36), we use multi-station auto cold forging production line of imported HBF-438 and domestic Z47-24/4 machine to ensure bolt size, surface smoothness and conform to the standards.

3)        For blade bolt, T-style nut,Embedded bolt extender, we use the advanced CNC processing equipment to ensure the processing precision of products.

4)        After the heat treatment, bolts will be processed the metallographic inspection, magnetic particle inspection and hardness nondestructive sorting according to the company's inspection standards for products to ensure mechanical performance 100% qualified.

5)        For mechanical properties inspection of the Boltass kit, we use the tensile testing machine (300-5000 KN), low temperature impact testing machine and various hardness tester in order to ensure that the test accuracy. For the torque coefficient testing, we use the advanced intelligent torque coefficient detector (10000N·M~30000N·M) to guarantee that the test data are accurate and reliable.

 

 

 

      We warmly welcome both domestic and overseas clients to inspect, instruct and develop the technical communication and business cooperation , and will promise you best product with excellent service at competitive price!  

 

 

 

Projects Supply:

Shanghai Tunnel Co., Ltd.: the 2nd tunnel line:Supply high strength and stainless steel fastener. 
 · Shanghai Waigaoqiao Power Plant: Stainless steel bolts and high strength bolts. 
 · The longest cross-sea bridge——Hangzhou Bay Bridge, which has a total length of 36KM:Supply all the hex bolts. 
 · Ethylene project of Sinopec Zhenhai Refining&Chemical Company: stainless steel studs and bolts. 
 · Shenzhen 5th Metro line of China Railway Group: high strength bolts.
 · Zhoushan Islands Island Bridge: stainless steel bolts and high strength bolts. 
 · Shanghai Donghai Bridge: stainless steel bolts and high strength bolts.
 · Shanghai's Chongming Island Bridge: high strength bolts.
 · The corss-sea bridge—Hongkong to Shenzhen:supply stainless steel bolts A4-80. 
· Panasonic Power Station Phase II Project in Japan: Supply large size steel studs. 
 ·The biggest Thermal power plant Phase II Project in Taiwan: Heavy hex bolts and structural parts. 
 ·Hong Kong Biggest Installation Company: Shenzheng-Hongkong Bridge, Hong Kong Western channels, Supply high grade stainless steel fastener.
 · Light Rail and Petroleum Pipeline Project in Middle East: Supply high strength and stainless steel fastener