Basic Product Information
- Product Name: Swivel bolts, eye bolts, fish-eye bolts, swivel eye screws
- Standards: DIN 444 (International Standard), GB/T 798
- Common Strength Grades: Grade 4.8 / Grade 5.8 / Grade 8.8
- Common Materials:
Carbon Steel: Q235, Q355, 45# Steel
Stainless Steel: A2-70 / 304, A4-70 / 316
- Surface Treatments:
Carbon Steel: Blue-white zinc, colored zinc, blackening, hot-dip galvanizing
Stainless Steel: Natural finish, passivation
- Structural Features: The head features a round hole (fish-eye), the shank is fully threaded, and it can be used with pins, fork connectors, and lifting eyes
Product Features
The head of the swivel bolt features a hole that can accommodate pins, split pins, or tie rods, enabling articulation, pivoting, adjustment, and tensioning. It is ideal for connections requiring angular adjustments.
Manufactured in accordance with DIN 444 standards, these bolts feature standardized dimensions and are universally compatible worldwide. They serve as standard components for mechanical equipment, piping, valves, and control mechanisms.
Fully threaded design allows for free length adjustment when paired with a nut, making it suitable for various applications such as tensioning, limiting, supporting, and hinging.
Carbon steel offers an economical and versatile option, while stainless steel provides corrosion and rust resistance. High-strength grades are available for heavy-duty tensioning structures.
Standard sizes from M5 to M24 are available, and hole size, overall length, and thread length can be customized to meet the requirements of special equipment.
Typical Applications
- Valves, pumps, and pipe joint connections
- Rods, control links, and support mechanisms in mechanical equipment
- Door and window hinges, hinge mechanisms, and telescoping mechanisms
- Articulated joints in agricultural machinery, construction machinery, and marine vessels
- Movable connections in guardrails, brackets, and safety nets
- Stainless steel joints for corrosion-resistant applications in the food, medical, and chemical industries
Table of Common Sizes for DIN 444 Threaded Rods (Unit: mm)
|
Thread size d |
Pitch P |
Head hole diameter d1 |
Head outer diameter D |
Head thickness H |
Common length range L |
|
M5 |
0.8 |
3 |
10 |
5 |
25–80 |
|
M6 |
1.0 |
4 |
12 |
6 |
30–100 |
|
M8 |
1.25 |
5 |
15 |
8 |
40–120 |
|
M10 |
1.5 |
6 |
18 |
10 |
50–150 |
|
M12 |
1.75 |
8 |
22 |
12 |
60–200 |
|
M16 |
2.0 |
10 |
28 |
16 |
80–250 |
|
M20 |
2.5 |
12 |
34 |
20 |
100–300 |
|
M24 |
3.0 |
14 |
40 |
24 |
120–350 |
Standard Length Series
25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 120, 140, 160, 180, 200
Selection Guide
- Indoor, dry environments: Q235 carbon steel + black oxide / electrogalvanized (high cost-effectiveness)
- Outdoor, open-air, or humid factory settings: Hot-dip galvanized carbon steel swivel bolts
- Chemical (acid/alkali), coastal salt fog, or wastewater environments: 304 / 316 stainless steel swivel bolts
- High-Tensile, Heavy-Duty Molds: Grade 8.8 Reinforced Forged Type
FAQ
What is the difference between swivel bolts and standard tension bolts?
Swivel bolts feature a universal ball-and-socket joint that allows multi-angle movement, preventing breakage due to off-axis forces. Standard bolts can only withstand vertical forces.
Can stainless steel swivel bolts withstand high temperatures?
304/316 grades are suitable for standard high-temperature and acid/alkali corrosion environments and are more durable than carbon steel.
Can you produce non-standard sizes based on drawings?
We support customization of any diameter, length, and hole size based on provided drawings or samples.
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