Galvanized Flange Nut
When it comes to the surface treatment of DIN6923 flange nuts, there are typically two options available - yellow zinc and zinc plated, both of which are cold-galvanized. However, hot dip galvanizing is not suitable for hex flange nuts due to certain problems caused by this process. For instance, after undergoing hot-dip galvanizing, there may be residual zinc that becomes attached to the thread, which is hard to remove. In addition, the thickness of the zinc layer may be uneven, which could negatively impact the fit of the various parts. Therefore, it's important to carefully consider the specific requirements of a project before determining the most appropriate surface treatment method to use.
Furthermore, the mechanical strength of grade 8 10 flange nuts may be compromised due to the elevated operating temperature associated with hot-dip galvanizing.
Hex flange nuts, specifically DIN6923 flange nuts, present certain limitations that make them unsuitable for hot-dip galvanizing. These limitations include their small sizes, irregular shapes, and the requirement for threading in some cases. These factors collectively render the process of hot-dip galvanizing ineffective for hex flange nuts.
Advantages of Galvanized Flange Nut
2. When it comes to coatings, galvanizing stands out for its affordability as the processing cost is significantly lower compared to other options.
2. Durable and good anti-corrosion performance.
Production Process of Galvanized Flange Nut
Specification of Galvanized Flange Nut
d | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M20 | ||
P | Thread Pitch | Coarse Thread | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 |
Fine Thread 1 | / | / | 1 | 1.25 | 1.5 | 1.5 | 1.5 | 1.5 | ||
Fine Thread 2 | / | / | / | -1 | -1.25 | / | / | / | ||
c | MIN | 1 | 1.1 | 1.2 | 1.5 | 1.8 | 2.1 | 2.4 | 3 | |
da | MIN | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | |
MAX | 5.75 | 6.75 | 8.75 | 10.8 | 13 | 15.1 | 17.3 | 21.6 | ||
dc | MAX | 11.8 | 14.2 | 17.9 | 21.8 | 26 | 29.9 | 34.5 | 42.8 | |
dw | MIN | 9.8 | 12.2 | 15.8 | 19.6 | 23.8 | 27.6 | 31.9 | 39.9 | |
e | MIN | 8.79 | 11.05 | 14.38 | 16.64 | 20.03 | 23.36 | 26.75 | 32.95 | |
m | MAX | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | |
MIN | 4.7 | 5.7 | 7.6 | 9.6 | 11.6 | 13.3 | 15.3 | 18.9 | ||
mw | MIN | 2.2 | 3.1 | 4.5 | 5.5 | 6.7 | 7.8 | 9 | 11.1 | |
s | MAX=Nominal Size | 8 | 10 | 13 | 15 | 18 | 21 | 24 | 30 | |
MIN | 7.78 | 9.78 | 12.73 | 14.73 | 17.73 | 20.67 | 23.67 | 29.67 | ||
r | MAX | 0.3 | 0.36 | 0.48 | 0.6 | 0.72 | 0.88 | 0.96 | 1.2 | |
Common Grade and Coating
Standard | Material | Grade | Finish | Thread |
DIN6923 | carbon steel | 4 | Plain | UNC |
Zinc plated | ||||
Alloy steel | Yellow zinc plated | |||
PTFE | ||||
Stainless steel | Black Oxide | UNF | ||
Dacromet | ||||
Other | HDG | |||
Other |
Application Area of Galvanized Flange Nut
The galvanized flange nuts are not only beautiful but also have good anti-corrosion performance, which improves the service life of the nut. Zinc plated flange nuts are widely used in petrochemical, automobile manufacturing, construction, pressure pipelines, rail transit, steel structure engineering, large power generation machinery facilities and infrastructure and other fields. Of course, in some specific locations in these fields, other products are also used, such as rail bolts, U-bolts, flat head hex socket bolts, T-bolts, hex bolts and Hex nuts, etc.
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