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12.9 Grade Steel Galvanized Structure Hex Bolts DIN6914

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.

Quantity:
  • DIN6914
  • HNF
  • 20170614

 

12.9 Grade Steel Galvanized Structure Hex Bolts DIN6914

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

12–1-12

120

130

150 minimum
173 maximum

C33–38


ASTM A490 Type 2 (withdrawn)

12–1


ASTM A490 Type 3

12–1-12

 

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SIZE 1/2 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2
F 7/8 1-1/16 1-1/4 1-7/16 1-5/8 1-13/16 2 2-3/16 2-3/8
H 5/16 25/64 15/32 35/64 39/64 11/16 25/32 27/32 15/16
LT 1.00 1.25 1.38 1.50 1.75 2.00 2.00 2.25 2.25

 

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Name High Strength Steel Black Structure Hex Bolts DIN6914
Place of Origin Jiaxing, Zhengjiang, China
Size M12-M36  or non-standard as request&design
Finish plain, zinc plated, black oxide, hot dip galv.et
Head Type round
Material Carbon steel, stainless steel, alloys steel   etc.
Grade A2-70,A4-80,4.8-12.9
Standard GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS etc
Non-standards OEM is available, according to drawing or samples
Samples Samples are free.
Package Bulk in master cartons, then on pallets, or according to customers' requirement.
Payment T/T

 

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