High Quality Press Riveting Screw specifications mainly include thread size and length. Thread sizes range from M3 to M10, which are the most common for sheet metal assembly. Lengths go from 6mm to 30mm—you pick based on how thick your sheet metal is. Too long or too short will affect the holding effect.
Grades are pretty straightforward: standard grade and high-strength grade. Standard grade works for regular tasks, like furniture or light equipment assembly. High-strength grade is made of thicker material, good for machines or parts that need to bear more force.
Each screw has its spec and grade marked on the packaging label, so it’s easy to pick the right one. No complicated coding, just simple numbers and words. High Quality Press Riveting Screw’s specs and grades cover most common sheet metal work needs, no extra fancy options.
We start with checking raw materials—each batch of metal gets inspected for cracks or weak spots. No faulty material makes it to production; that’s the first line of control.
During production, we spot-check screws at every step. We look at thread evenness and sharpness—they need to fit and install smoothly. We also measure size often to make sure diameter and length match standard specs. Surface treatment is checked too, ensuring no thin spots or misses that could cause rust later.
Before shipping, we pull random samples from each batch for installation tests. We drive them into sheet metal to see if they hold firmly. We also check for any surface scratches or deformities. High Quality Press Riveting Screw goes through these simple but strict checks to make sure they work as they should for daily use.
Q:How long can it last in humid environments?
A:It depends on the surface treatment. Zinc-plated ones are fine for indoor or covered outdoor spots but may rust after 1-2 years in high humidity. Hot-dip galvanized ones can last 5-8 years outdoors, even in slightly damp areas. If you need long-term use in humid or coastal areas, go for stainless steel ones—they have better corrosion resistance. We can also provide relevant test data if you need to check the specific rust-proof period.
| Screw Threadd | 2# | 4# | 6# | 8# | 10# | 10# | 1/4 | 5/16 | M2.5 | M3 | M3.5 | M4 | M5 | M6 | M8 | |
| P | / | / | / | / | / | 1 | / | 0.45 | 0.5 | 0.6 | 0.7 | 0.8 | 1 | 1.25 | ||
| PP | 56 | 40 | 32 | 32 | 24 | 32 | 20 | 18 | 1 | / | / | / | / | / | ||
| dk | Nominal Size | 0.144 | 0.176 | 0.206 | 0.237 | 0.256 | 0.256 | 0.337 | 0.376 | 4.1 | 4.6 | 5.3 | 5.9 | 6.5 | 8.2 | 9.6 |
| max | 0.159 | 0.191 | 0.221 | 0.252 | 0.271 | 0.271 | 0.352 | 0.391 | 4.5 | 5.7 | 6.3 | 6.9 | 8.6 | 10 | ||
| min | 0.129 | 0.161 | 0.191 | 0.222 | 0.241 | 0.241 | 0.322 | 0.361 | 3.7 | 4.2 | 4.9 | 5.5 | 6.1 | 7.8 | 9.2 | |
| s | max | 0.075 | 0.085 | 0.090 | 0.090 | 0.100 | 0.100 | 0.135 | 0.160 | 1.95 | 2.1 | 225 | 2.4 | 2.7 | 3 | 3.7 |
| Sheet Thickness | min | 0.040 | 0.040 | 0.040 | 0.040 | 0.040 | 0.040 | 0.082 | 0.093 | 1 | 1 | 1 | 1 | 1 | 1.6 | 2.4 |
| Rocommend Hole Size | min=nominal size | 0.085 | 0.111 | 0.137 | 0.163 | 0.189 | 0.189 | 0.249 | 0.311 | 2.5 | 3 | 3.5 | 4 | 5 | 6 | 8 |
| max | 0.088 | 0.114 | 0.140 | 0.166 | 0.192 | 0.192 | 0.252 | 0.314 | 2.58 | 3.0B | 3.58 | 4.08 | 5.08 | 6.0B | 8.08 | |
| Code | steel | FH | FH | FH | FH | FH | FH | FH | FH | FH | FH | FH | FH | FH | FH | FH |
| stainless steel | FHS | FHS | FHS | FHS | FHS | FHS | FHS | FHS | FHS | FHS | FHS | FHS | FHS | FHS | FHS | |
| aluminum | / | FHA | FHA | FHA | FHA | FHA | FHA | FHA | FHA | FHA | FHA | FHA | FHA | 1 | ||