0102030405
China Factory Suppliers of DIN 6915 Steel Structure Hexagon Nut for Engineering Projects and Steel Structures
Production parameter
| thread specification d | M16 | M20 | (M22) | M24 | |
| P | pitch | 2 | 2.5 | 2.5 | 3 |
| da | Max | 17.3 | 21.6 | 23.8 | 25.9 |
| Min | 16 | 20 | 22 | 24 | |
| dw | Min | 24.9 | 31.4 | 33.3 | 38 |
| e | Min | 29.56 | 37.29 | 39.55 | 45.2 |
| m | Max | 17.1 | 20.7 | 23.6 | 24.2 |
| Min | 16.4 | 19.4 | 22.3 | 22.9 | |
| mw | Min | 13.1 | 15.5 | 17.8 | 18.3 |
| m1 | Min | 11.5 | 13.6 | 15.6 | 16 |
| c | Max | 0.8 | 0.8 | 0.8 | 0.8 |
| Min | 0.4 | 0.4 | 0.4 | 0.4 | |
| s | Max | 27 | 34 | 36 | 41 |
| Min | 26.16 | 33 | 35 | 40 | |
| Thousand piece weight (steel)≈kg | 61.51 | 118.77 | 146.59 | 202.67 | |
Production description
The main application of steel structure bolt nut is in steel structure engineering project to connect the nodes of steel plate thick steel structure. Better fastening characteristics, used for steel structure and engineering projects, a fastening effect. In the general steel structure, the required steel structure bolts are above 8.8 grade, there are also 10.9,12.9. All of are high-toughness steel structure bolts. Sometimes the bolts on the steel structure do not use the electroplating process, but use the primary color can be.
Steel structure bolts are divided into torsion-shear high strength bolts and large hexagonal head high strength bolts. Large hexagonal high strength bolt belongs to the high toughness level of general screws, torsional shear high strength bolt is an improved version of large hexagonal high strength bolt, in order to better engineering construction.
Points to note
(1) Surface rust, oil, burr in bolt hole wall, welding tumor should be cleaned up.
(2) The required anti-scratch coefficient must be achieved after the treatment of contact friction surface.
(3) No oil, soil and other sundries are allowed when the friction surface of the treated component is installed.
(4) The friction surface of the assembly should be kept dry during installation and should not be used in rain.
(5) Strictly check and correct the deformation of the connected steel plate before installation.
(6) Do not hammer into the bolt to prevent damage to the screw thread.
(7) The electric wrench, which is checked regularly in use, ensures the accuracy of the torque and operates in the correct tightening order.
The main safety technical measures
The size of the spanner using the movable wrench should be in accordance with the size of the nut, should not be used on the small wrench casing. High-altitude operations should be used.
Frequently Asked Questions
What are the main applications of steel structure bolt nuts?
They are primarily used in steel structure engineering projects to connect the nodes of thick steel plate structures, providing enhanced fastening performance.
What strength grades are typical for these steel structure bolts?
Generally, steel structure bolts require a grade above 8.8. Common high-toughness grades include 8.8, 10.9, and 12.9.
What are the different types of high-strength steel structure bolts?
They are divided into two main types: large hexagonal head high strength bolts and torsion-shear high strength bolts, with the latter being an improved version for better engineering construction.
Can steel structure bolts be installed during rainy weather?
No, the friction surface of the treated assembly must be kept completely dry during installation and should not be worked on in the rain.
What preparation is needed on the contact friction surface before installation?
Surface rust, oil, burrs in the bolt hole wall, and welding tumors must be cleaned up. Additionally, no oil, soil, or other debris should remain on the friction surface, and the required anti-scratch coefficient must be achieved.
How should the wrench be selected and operated for safe installation?
The size of the movable wrench must match the size of the nut, and it should not be used on smaller wrench casings. Electric wrenches must be calibrated regularly to ensure accurate torque and operated in the correct tightening sequence.