Fortune Hardware Co., LTD

Standard: DIN912, ISO4762, GB/T70-2000, DIN7984

Material： 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

Finish：None.

Head：Hexagon Socket

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 Hexagon Socket Head Bolt.pdf

 

 Stainless Steel Hexagon Socket Head Bolt is a hex socket bolt, also known as the socket head cap bolt, is a headed and externally threaded part designed for insertion through a close tolerance internally tapped hole and mated with a nut. Tension on the hex socket bolt is induced by rotation of the bolt head. There is a hex socket in the head that accepts a hex wrench to tighten the socket head cap bolt. The point at the threaded end of the socket head cap bolt is machined flat so it will fit into a drilled hole.

 

"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.

 

 You can refer to below chart/list of Screw head/Thread ending

Item	Standard	d1(mm)	L(mm)	d2(mm)	K(mm)	S(mm)	t min(mm)
M3X6	ISO4762	M3	6	5.5	3	2.5	1.3
M3X8	ISO4762	M3	8	5.5	3	2.5	1.3
M3X10	ISO4762	M3	10	5.5	3	2.5	1.3
M3X12	ISO4762	M3	12	5.5	3	2.5	1.3
M3X16	ISO4762	M3	16	5.5	3	2.5	1.3
M3X20	ISO4762	M3	20	5.5	3	2.5	1.3
M3X25	ISO4762	M3	25	5.5	3	2.5	1.3
M3X30	ISO4762	M3	30	5.5	3	2.5	1.3
M4X6	ISO4762	M4	6	7	4	3	2
M4X8	ISO4762	M4	8	7	4	3	2
M4X10	ISO4762	M4	10	7	4	3	2
M4X12	ISO4762	M4	12	7	4	3	2
M4X14	ISO4762	M4	14	7	4	3	2
M4X16	ISO4762	M4	16	7	4	3	2
M4X18	ISO4762	M4	18	7	4	3	2