Key Product Features
Superior Corrosion Resistance: These Teflon-coated studs are resistant to strong acids, strong alkalis, salt spray, and organic solvents, making them suitable for long-term use in marine, chemical, wastewater, and high-humidity environments. Their rust and corrosion resistance far exceeds that of hot-dip galvanized and standard stainless steel.
Thermal Stability: This product has a continuous operating temperature range of -190°C to +260°C and can withstand short-term temperatures up to 300°C. It does not melt at high temperatures or become brittle at low temperatures.
Low-Friction Self-Lubrication: With a coefficient of friction of 0.05–0.15, these studs prevent seizing and are easy to install and remove, making them ideal for frequent disassembly and high-temperature applications.
Non-stick and Easy to Clean: Resists oil, scale, and chemical media, making maintenance simple.
High-Strength Base Material: Common base materials include 45#, 35CrMoA, 42CrMoA, and B7 (A193-B7), with strength grades of 8.8, 10.9, and 12.9.
Standards: GB 897/898, HG/T 20613, ASTM A193, ASME B18.31.2
Applicable Industry Applications
- Petrochemicals, oil refining, chemical equipment, pipeline flanges
- Offshore platforms, ships, desalination, salt spray environments
- Power generation (thermal / hydro / wind), wastewater treatment, desulfurization and denitrification
- Food processing machinery, pharmaceutical equipment, textile printing and dyeing
- Bridges, steel structures, weather-resistant and anti-corrosion projects
Coating Colors
- Standard: Blue (common)
- Optional: Red, yellow, green, gray (customizable upon customer request)
Teflon Double-Ended Studs: Common Specifications Table (Metric + Imperial)
1. Metric Specifications (GB Standard)
Diameter: M6–M48 Length: 50–500 mm (customizable) Common sizes:
|
Specification d |
Length L (mm) |
Standard Length |
Performance Grade |
Standard |
|
M6 |
50–150 |
60,80,100 |
8.8/10.9 |
GB897 |
|
M8 |
50–200 |
70,90,120 |
8.8/10.9 |
GB897 |
|
M10 |
50–250 |
80,100,150 |
8.8/10.9 |
GB897 |
|
M12 |
60–300 |
100,120,160 |
8.8/10.9 |
GB897 |
|
M16 |
70–350 |
120,150,200 |
8.8/10.9 |
GB897 |
|
M20 |
80–400 |
150,200,250 |
8.8/10.9 |
GB897 |
|
M24 |
100–450 |
200,250,300 |
10.9 |
GB897 |
|
M30 |
120–500 |
250,300,350 |
10.9 |
GB897 |
|
M36 |
150–500 |
300,350,400 |
10.9 |
GB897 |
|
M42/M48 |
200–500 |
350,400,450 |
10.9 |
HG20613 |
2. Imperial / ANSI Specifications (ASTM A193 B7)
Diameter: 1/4"–1-3/8" Length: 2"–12" (customizable) Common sizes:
|
Specifications (in) |
Length L (in) |
Material |
Grade |
Standard |
|
1/4" |
2–6 |
B7 |
10.9 |
A193 |
|
5/16" |
2–6 |
B7 |
10.9 |
A193 |
|
3/8" |
2.5–7 |
B7 |
10.9 |
A193 |
|
1/2" |
3–8 |
B7 |
10.9 |
A193 |
|
5/8" |
3.5–9 |
B7 |
10.9 |
A193 |
|
3/4" |
4–10 |
B7 |
10.9 |
A193 |
|
7/8" |
5–11 |
B7 |
10.9 |
A193 |
|
1" |
6–12 |
B7 |
10.9 |
A193 |
|
1-1/4" |
7–12 |
B7 |
10.9 |
A193 |
Common Materials and Grades
- Carbon steel / Alloy steel: 45#, 35CrMoA, 42CrMoA, B7 (A193-B7)
- Strength grades: Grade 8.8, Grade 10.9, Grade 12.9
- Matching nuts: Grade 2H, Grade 8, Grade 10 (with Teflon coating)
Precautions
- Installation torque: Due to low friction, the torque should be reduced by 10–20% to prevent over-tightening.
- Avoid scratching: The coating is relatively soft; take precautions during installation to prevent the studs from being scratched by installation tools.
- Temperature limits: Long-term exposure ≤ 260°C; exceeding this temperature will damage the coating.
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