You can use Secure Face projection welding bolts to put things together when you can only reach one side of the piece—way better than regular bolts that need nuts on the other side.
Welding parts together creates a tight seal at the joints, leaving no gaps at all. This prevents leakage, whether of liquid or gas. Welding is like "sewing" a solid thread through the metal, making it incredibly reliable. Precisely because of its airtightness, it has become the "guardian" of many critical locations. For example, large fluid storage tanks, the diamond casings of machinery, and powerful hydraulic equipment—all rely on welding to ensure leak-proof, airtight, and safe and reliable operation.
Mon | M5 | M6 | M8 | M10 |
P | 0.8 | 1 | 1.25 | 1.5 |
dk max | 12.4 | 14.4 | 16.4 | 20.4 |
dk min | 11.6 | 13.6 | 15.6 | 19.6 |
k max | 2 | 2.2 | 3.2 | 4.2 |
k min | 1.6 | 1.8 | 2.8 | 3.8 |
e max | 2.25 | 2.75 | 2.25 | 2.75 |
e min | 1.75 | 2.25 | 1.75 | 2.25 |
b max | 3.3 | 4.3 | 5.3 | 6.3 |
b min | 2.7 | 3.7 | 4.7 | 5.7 |
h max | 0.8 | 0.9 | 1.1 | 1.3 |
h min | 0.6 | 0.75 | 0.9 | 1.1 |
d1 max | 10 | 11.5 | 14 | 17.5 |
d1 min | 9 | 10.5 | 13 | 16.5 |
r max | 0.6 | 0.7 | 0.9 | 1.2 |
r min | 0.2 | 0.25 | 0.4 | 0.4 |
a max | 3.2 | 4 | 5 | 5 |
Most Secure Face projection welding bolts are made from low-carbon steel or alloy steel—these kinds weld really well. They have the right electrical resistance and handle heat properly.
The steel in these bolts is mixed just right. That way, the projections melt evenly, and they fuse well with common base metals like mild steel.
The best welding settings for a Secure Face projection welding bolt depend on the bolt and material size, how thick the base metal is and what kind it is, and the design of the projections.
Usually, you need a high current—like 8-15 kA—a really short weld time (3-15 cycles), and enough pressure from the electrode, maybe 300-800 psi. Getting these settings right makes sure the projections flatten out and fuse properly without any metal splattering.