JIAXING HAINA FASTENER CO.,LIMITED
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DIN6914
HNF
20170614
Heavy hex structural bolts are designed for steel-to-steel structural connections.
Steel Structral bolts are a kind of high strength bolts and also a standard part. General steel structure, the requirements of the steel bolts are 8.8 or more, there are 10.9, 12.9, all of the high-strength steel bolts, and sometimes the steel structure is not the need for electroplating bolts.
Heavy hex bolts have a head that is larger than a standard (finish) hex head. Standard heavy hex bolts are made of low to mid carbon steel. The large head offers a greater bearing surface that distributes the clamping load over a greater area.
Top of Head. Top of head shall be full form and chamfered with the diameter of chamfer circle being equal to the maximum width across flats, within a tolerance of minus 15 percent.
Head Taper. Maximum width across flats and across corners shall not be exceeded. No transverse section through the head between 25 percent and 75 percent of actual head height, as measured from the bearing surface, shall be less than the minimum width across flats and across corners.
Steel Structral bolts are mainly used in steel structure, used to connect the steel structure of the connection point.Steel bolts are divided into torsional shear high strength bolts and large hexagonal high strength bolts, large hexagon high strength bolts are high strength grade of ordinary screws, and torsional shear high strength bolts are improved in large hexagon high strength bolts, in order to better construction.
Head markings and strengths for metric hex-head cap screws | ||||||
Grade identification marking | Specification | Nominal size range [mm] | Proof strength [MPa] | Yield strength (min) [MPa] | Tensile strength (min) [MPa] | Core hardness [Rockwell] |
ASTM A490M Type 1 | 12–36 | 830 | 940 | 1040 | C33–39 | |
ASTM A490M Type 2 (withdrawn) | ||||||
ASTM A490M Type 3 | ||||||
Imperial head markings and mechanical properties | ||||||
Grade identification marking | Specification | Nominal size range [in] | Proof strength [ksi] | Yield strength (min) [ksi] | Tensile strength (min) [ksi] | Core hardness [Rockwell] |
ASTM A490 Type 1 | 1⁄2–1-1⁄2 | 120 | 130 | 150 minimum | C33–38 | |
ASTM A490 Type 2 (withdrawn) | 1⁄2–1 | |||||
ASTM A490 Type 3 | 1⁄2–1-1⁄2 | |||||
Heavy hex structural bolts are designed for steel-to-steel structural connections.
Steel Structral bolts are a kind of high strength bolts and also a standard part. General steel structure, the requirements of the steel bolts are 8.8 or more, there are 10.9, 12.9, all of the high-strength steel bolts, and sometimes the steel structure is not the need for electroplating bolts.
Heavy hex bolts have a head that is larger than a standard (finish) hex head. Standard heavy hex bolts are made of low to mid carbon steel. The large head offers a greater bearing surface that distributes the clamping load over a greater area.
Top of Head. Top of head shall be full form and chamfered with the diameter of chamfer circle being equal to the maximum width across flats, within a tolerance of minus 15 percent.
Head Taper. Maximum width across flats and across corners shall not be exceeded. No transverse section through the head between 25 percent and 75 percent of actual head height, as measured from the bearing surface, shall be less than the minimum width across flats and across corners.
Steel Structral bolts are mainly used in steel structure, used to connect the steel structure of the connection point.Steel bolts are divided into torsional shear high strength bolts and large hexagonal high strength bolts, large hexagon high strength bolts are high strength grade of ordinary screws, and torsional shear high strength bolts are improved in large hexagon high strength bolts, in order to better construction.
Head markings and strengths for metric hex-head cap screws | ||||||
Grade identification marking | Specification | Nominal size range [mm] | Proof strength [MPa] | Yield strength (min) [MPa] | Tensile strength (min) [MPa] | Core hardness [Rockwell] |
ASTM A490M Type 1 | 12–36 | 830 | 940 | 1040 | C33–39 | |
ASTM A490M Type 2 (withdrawn) | ||||||
ASTM A490M Type 3 | ||||||
Imperial head markings and mechanical properties | ||||||
Grade identification marking | Specification | Nominal size range [in] | Proof strength [ksi] | Yield strength (min) [ksi] | Tensile strength (min) [ksi] | Core hardness [Rockwell] |
ASTM A490 Type 1 | 1⁄2–1-1⁄2 | 120 | 130 | 150 minimum | C33–38 | |
ASTM A490 Type 2 (withdrawn) | 1⁄2–1 | |||||
ASTM A490 Type 3 | 1⁄2–1-1⁄2 | |||||
