1)Hex head Black oxide high tensile steel bolts 2)Material:carbon steel 3)grade:4.8 5.8 6.8 8.8 10.9 4)size:as client require

1)   Hex head Black oxide high tensile steel bolts    

                                                                                                                                                                                                                                         use: Apply to railway and highway bridge,boiler steel structure,industrial workshop,High-rise civil building,tower mast structure,lifting machinery and other steel structure ,etc.                                                                               

HANGZHOU RONGLI STANDARD FASTENER CO.,LTD
Product
Material		Carbon steel
Standard		1)ANSI/ASME B18.2.1 ASTM A325 ASTM A490
		2)DIN 931 933 7990   JIS 1180
		3)GB 5785 5783 GB/T1288-1231 GB/T3632
Surface treatment		Black oxide Phosphate Zinc plated Dacromet and etc
Properties Grade		4.8 5.8 6.8 8.8 10.9
Use		Apply to railway and highway bridge,bolier steel structure,industrial workshop,high-rise civil building,tower Mast structure,lifting machinery and other steel structure,etc
certification		pass ISO9001:2008   Have UKTC CE   SGS TESTING
Price
Head mark		As client requirement
Payment		T/T L/C etc.
Port		shanghai   china
MOQ		50ton/per day
Sample		Available
Note
1)we will offer price referring to your detail request.So please kindly
inform us of the standard,size,surface treament and other requirement.
2)we will give you some advice for reference about packing bags.
3)catalog will provided and sample are available

2) about us

Our company has advanced and  nature production technology and the special testing instruments for production .

the production practices are very rich ,the quality management system is perfect .Adopt advanced and mature hot

forging production technology , using advanced successive mesh belt treament ,the products are according to quality

technical requirements,carry out "o" defect management, ensure the products of our company are quality,realiby,safety

  

                              

3)specifications

1  surface treatment: Black oxide (black), phosphate (grey), zinc plated (Yellow/Silver) and dacromet (Sliver )

2  grade: 6.8   8.8   10.9                                                     

3  delivery date :within 20 days after receiving the LC or TT  prepay 4

4   Mechanical properties: according to GB/T 10433, DIN, EN ISO, ANSI/ASME