Size:φ6-φ36
Grade：4.8，8.8
Surface:ZP/HDG/BLSCK/DACROMET
Specifications | φ3.2 | φ3.7 | φ4.3 | φ5.3 | φ6.4 | φ7.4 | φ8.4 | φ10.5 | φ13 | φ15 | φ17 | |
M | Corresponding bolt | M3 | M3.5 | M4 | M5 | M6 | M7 | M8 | M10 | M12 | M14 | M16 |
d | Minimum | 3.2 | 3.7 | 4.3 | 5.3 | 6.4 | 7.4 | 8.4 | 10.5 | 13 | 15 | 17 |
Maximum value | 3.38 | 3.88 | 4.48 | 5.48 | 6.62 | 7.62 | 8.62 | 10.77 | 13.27 | 15.27 | 17.27 | |
dс | Maximum value | 7 | 8 | 9 | 10 | 12 | 14 | 16 | 20 | 24 | 28 | 30 |
Minimum | 6.64 | 7.64 | 8.64 | 9.64 | 11.57 | 13.57 | 15.57 | 19.48 | 23.48 | 27.48 | 29.48 | |
h | nominal | 0.5 | 0.5 | 0.8 | 1 | 1.6 | 1.6 | 1.6 | 2 | 2.5 | 2.5 | 3 |
Maximum value | 0.55 | 0.55 | 0.9 | 1.11 | 1.8 | 1.8 | 1.8 | 2.2 | 2.7 | 2.7 | 3.3 | |
Minimum | 0.45 | 0.45 | 0.7 | 0.9 | 1.4 | 1.4 | 1.4 | 1.8 | 2.3 | 2.3 | 2.7 | |
Weight/mpcs(kg) | 0.119 | 0.155 | 0.308 | 0.443 | 1.02 | 1.39 | 1.83 | 3.57 | 6.27 | 8.62 | 11.3 | |
Specifications | φ19 | φ21 | φ23 | φ25 | φ27 | φ28 | φ29 | φ31 | φ33 | φ34 | φ36 | |
M | Corresponding bolt | M18 | M20 | M22 | M24 | M26 | M27 | M28 | M30 | M32 | M33 | M35 |
d | Minimum | 19 | 21 | 23 | 25 | 27 | 28 | 29 | 31 | 33 | 34 | 36 |
Maximum value | 19.33 | 21.33 | 23.33 | 25.33 | 27.33 | 28.33 | 29.33 | 31.39 | 33.62 | 34.62 | 36.62 | |
dс | Maximum value | 34 | 37 | 39 | 44 | 50 | 50 | 50 | 56 | 60 | 60 | 66 |
Minimum | 33.38 | 36.38 | 38.38 | 43.38 | 49.38 | 49.38 | 49.38 | 55.26 | 58.8 | 58.8 | 64.8 | |
h | nominal | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 |
Maximum value | 3.3 | 3.3 | 3.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 5.6 | 5.6 | 5.6 | |
Minimum | 2.7 | 2.7 | 2.7 | 3.7 | 3.7 | 3.7 | 3.7 | 3.7 | 4.4 | 4.4 | 4.4 | |
Weight/mpcs(kg) | 14.7 | 17.2 | 18.3 | 32.3 | 43.7 | 42.3 | 40.9 | 53.6 | 77.4 | 75.3 | 94.3 | |
Effect:
1. Increase the contact area between the screw and the machine.
2. Eliminate the damage to the surface of the machine when the spring pad is unloading the screw. When used, it must be a spring pad and a flat pad. The flat pad is next to the surface of the machine, and the spring pad is between the flat pad and the nut.
Flat pads are thin pieces of various shapes used to reduce friction, prevent leakage, isolate, prevent loosening, or distribute pressure. Many materials and structures have such components, which are used to perform various similar functions. Limited by the material and process of threaded fasteners, the supporting surface of bolts and other fasteners is not large. Therefore, in order to reduce the compressive stress of the pressure-bearing surface to protect the surface of the connected part, flat pads are used.
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