🔧 Butterfly Screw, also commonly referred to as a Wing Screw, is a specialized fastener designed for effortless hand-tightening. Featuring an ergonomic head with wide lateral wings, it provides a larger leverage surface, making manual adjustments more efficient and tool-free.
📏 Dimensional Specifications
| Nominal diameter d |
10# |
1/4 |
5/16 |
3/8 |
7/16 |
1/2 |
5/8 |
| d |
0.19 |
0.25 |
0.3125 |
0.375 |
0.4375 |
0.5 |
0.625 |
| PP |
24 |
20 |
18 |
18 |
14 |
13 |
11 |
| n |
Max |
0.97 |
1.16 |
1.44 |
1.72 |
2 |
2.31 |
2.84 |
| Min |
0.91 |
1.09 |
1.38 |
1.66 |
1.94 |
2.22 |
2.72 |
| H |
Max |
0.45 |
0.56 |
0.67 |
0.8 |
0.91 |
1.06 |
1.31 |
| Min |
0.39 |
0.5 |
0.61 |
0.73 |
0.84 |
0.94 |
1.19 |
| h |
Max |
0.15 |
0.17 |
0.18 |
0.2 |
0.21 |
0.23 |
0.27 |
| Min |
0.12 |
0.14 |
0.15 |
0.17 |
0.18 |
0.2 |
0.23 |
| dk |
Max |
0.39 |
0.47 |
0.55 |
0.63 |
0.71 |
0.79 |
0.96 |
| Min |
0.36 |
0.44 |
0.52 |
0.6 |
0.68 |
0.76 |
0.92 |
| k |
Max |
0.28 |
0.34 |
0.41 |
0.47 |
0.53 |
0.62 |
0.75 |
| Min |
0.22 |
0.28 |
0.34 |
0.41 |
0.47 |
0.5 |
0.62 |
| L |
Max |
2 |
3 |
3 |
4 |
3 |
3 |
2.5 |
| Min |
0.5 |
0.5 |
0.5 |
0.5 |
1 |
1 |
1 |
⚙️ Application Areas
🖥️
Display Industry
Used for fixing display components securely and efficiently.
🚗
Automobile Industry
For insulation and frequent dismantling and maintenance of automotive components.
✈️
Aerospace Industry
Used in electronic equipment for insulation and anti-interference treatment.
🖨️
Office Equipment
For production of rust-free and aesthetically practical office equipment.
🛋️
Furniture Assembly
Fixing sofas, beds, and wardrobes—stable, firm, and easy to adjust.
💡
Lamp Installation
Fast and convenient fixture mounting, reducing the need for tools.
🏠
Home Decoration
Wall décor, home ornaments, murals, and clock installation.
🏗️
Construction Field
Suitable for fixing furniture, wall hangings, and decorations in buildings.
⚠️ Material Notice:
The oil and chemical resistance of butterfly screws make them excellent mechanical materials. However, pay attention to hygroscopicity—moisture can reduce the tensile strength of nylon while improving ductility and impact resistance. For outdoor use, carbon black can be added to enhance weather resistance in high-temperature environments.
✅ Key Product Features
-
✔
Precision Threading: Deep threads and even pitch ensure uniform force and superior fastening performance.
-
✔
Smooth Finish: Expert workmanship results in a smooth surface with no burrs for safe, comfortable handling.
-
✔
Quality Raw Materials: Strictly controlled manufacturing and grinding processes deliver high hardness and long-term durability.
Q What is a butterfly screw and how does it differ from a regular screw?
A butterfly screw (also known as a wing screw) features large wing-shaped protrusions on either side of the head, allowing it to be tightened and loosened by hand without any tools. Unlike standard screws that require a screwdriver, butterfly screws are designed for quick, tool-free operation.
Q What materials are galvanized butterfly screws typically made from?
Galvanized butterfly screws are commonly made from carbon steel or stainless steel with a zinc (galvanized) coating applied to improve corrosion resistance. Some variants are also made from nylon or other engineering plastics for applications requiring insulation or lightweight properties.
Q What size butterfly screw should I choose for my application?
The appropriate size depends on the load requirements and the material being fastened. Refer to the dimensional specification table above — sizes range from 10# (0.19") to 5/8" (0.625") in nominal diameter. For heavier loads, choose a larger diameter such as 1/2" or 5/8".
Q Are butterfly screws suitable for outdoor use?
Yes. Galvanized butterfly screws are well-suited for outdoor applications due to their zinc coating, which provides corrosion protection. For nylon variants used outdoors, adding carbon black during injection molding significantly enhances UV and weather resistance.
Q Can butterfly screws be reused multiple times?
Yes, one of the key advantages of butterfly screws is their reusability. They are specifically designed for applications that require frequent disassembly and reassembly, such as automotive maintenance panels, furniture adjustments, and equipment covers.
Q How do I ensure a secure fit when using butterfly screws?
Ensure the thread pitch and nominal diameter match the receiving nut or threaded hole. Apply even hand pressure during tightening — the deep thread profile and uniform pitch of quality butterfly screws ensure a reliable, stable fastening. Avoid over-tightening, especially with nylon variants.
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