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Products > Metal Fasteners > Bolt > Stainless Steel Hex Flange Head Bolt
Product name : Stainless Steel Hex Flange Head Bolt
material : Stainless Steel
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Standard:   DIN EN 1662,DIN EN 1665, GB /T 5787;GB/T 5789;GB/T 16674;GB/T 5790-86;GB /T 16674.1; JIS B 1189; IFI-111
SUS301,304,18/8,0Cr18Ni9,X5CrNi1810,X10Cr13,410S21,if you need to use other stainless steel, please let us know.
Heat Treatment: None for normal, If you have special hardness requirement, please let us know.
Surface Hardness:220HV is Normal, 750HV max after Quench with SUS410
HeadHex Flange
Tensile strength:700N/mm2
Thread Direction:Normal is right hand/dextrorotation, if you want left hand, please let us know.
Refer to document as below:
Stainless Steel Hex Flange Head Bolt.pdf       

  Stainless Steel Hex Flange Head Bolt is a flange hex bolt is a bolt that has a washer-like flange cast into the hexagonal head of the bolt. Designed to be used without the aid of a flat or locking-style washer, the flange hex bolt is manufactured to properly displace the torque and clamping force of the bolt over a wider area than that of a typical hex head bolt. Used a great deal in the automobile industry, the flange hex bolt allows assembly line workers to install the fasteners much faster than a comparable bolt and washer.
One advantage the flange hex bolt has over a comparably-sized non-flanged bolt is its ability to displace the clamping force of the fastener over a greater range. On soft, aluminum automobile engine components, the use of a standard hex head bolt could potentially crack and damage the area surrounding the bolt head. With a flange hex bolt, the clamping force is displaced onto a greater area underneath the bolt head, thus saving the aluminum components. Valve covers, intake manifolds and water pumps are some of the aluminum components that often employ a flanged bolt head as a fastener. Other components of the automobile that benefit from the use of the flange hex bolt are the steering box, steering column and transmission.
"Stainless Steel" - With the addition of 12% chromium to iron, stainless steel is formed. The chromium protects the iron against most corrosion or red colored rust; thus the term "stainless steel". The ability of stainless to form a thin layer of protection on its outside surface, called a "passive film", is its most important characteristic in preventing corrosion.
"18-8" - 300 series stainless steel having approximately (not exactly) 18% chromium and 8% nickel. The term "18-8" is used interchangeably to characterize fasteners made of 302,302HQ,303,304,384, XM7, and other variables of these grades with close chemical compositions. There is little overall difference in corrosion resistance among the 18-8 types, but slight differences in chemical composition do make certain grades more resistant than others against particular chemicals or atmospheres.
Austentic - Refers to 300 series stainless, the most popular of the stainless alloys accounting for 85%-90% of stainless fasteners sold Named for sir Robert Williams Austen, an English metallurgist, austentic stainless is a crystal structure formed by heating steel, chromium, and nickel to a high temperature where it forms the characteristics of 300 series stainless steel.
And below is the common drawing for this kind:


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