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Home > Hot Products > High-Quality Galvanized Butterfly Bolts & Union Bolts - Grade 4.8 & 8.8 | China Suppliers & Factory Manufacturers, Factories
High-Quality Galvanized Butterfly Bolts & Union Bolts - Grade 4.8 & 8.8 | China Suppliers & Factory Manufacturers, Factories
High-Quality Galvanized Butterfly Bolts & Union Bolts - Grade 4.8 & 8.8 | China Suppliers & Factory Manufacturers, Factories
High-Quality Galvanized Butterfly Bolts & Union Bolts - Grade 4.8 & 8.8 | China Suppliers & Factory Manufacturers, Factories
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High-Quality Galvanized Butterfly Bolts & Union Bolts - Grade 4.8 & 8.8 | China Suppliers & Factory Manufacturers, Factories
High-Quality Galvanized Butterfly Bolts & Union Bolts - Grade 4.8 & 8.8 | China Suppliers & Factory Manufacturers, Factories
High-Quality Galvanized Butterfly Bolts & Union Bolts - Grade 4.8 & 8.8 | China Suppliers & Factory Manufacturers, Factories

High-Quality Galvanized Butterfly Bolts & Union Bolts - Grade 4.8 & 8.8 | China Suppliers & Factory Manufacturers, Factories

Butterfly bolts are an essential fastener type featuring a unique butterfly-shaped head, designed for quick manual installation and removal. These versatile bolts are widely used in various applications, including the installation of electronic devices and other equipment that require frequent disassembly. Manufactured in China, these butterfly bolts are crafted by reputable suppliers and factories, ensuring high quality and durability. Their user-friendly design allows for easy hand tightening and loosening, eliminating the need for additional tools, making them ideal for projects that require ongoing maintenance or part replacement. Choose our butterfly bolts from trusted China suppliers for reliable and efficient solutions in your assembly needs.

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Product Description

Galvanized butterfly bolts
💡 Butterfly Screw, also known as a Wing Screw, is a fastener designed specifically for hand-tightening operations. Featuring a larger lateral force surface, it allows for high-efficiency manual fastening without the need for additional tools.
📏 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
🛠️ Core Applications
  • 1Display Industry: Secure fixing for display components.
  • 2Automotive: Ideal for components requiring frequent disassembly.
  • 3Aerospace: Used in electronic equipment for insulation.
  • 4Furniture Assembly: Stability for sofas, beds, and cabinets.
  • 5Lamp Installation: Fast, tool-free lighting fixtures.
  • 6Construction: Fixing decorations and wall hangings.
⚠️ Material Characteristics & Maintenance

Butterfly screws offer excellent oil and chemical resistance. However, when using nylon variants, pay attention to hygroscopicity as moisture can influence tensile strength and ductility. For outdoor applications, carbon black is often added during molding to enhance weather and high-temperature resistance.

✨ Quality Advantages
  • ✔Deep threads and even tooth pitch for consistent fastening force.
  • ✔Smooth surface with no burrs, ensuring safe manual handling.
  • ✔Strictly controlled raw materials with precision grinding for high hardness.
❓ Frequently Asked Questions
How does a butterfly screw work?
A butterfly screw (wing screw) features wide wings that serve as a handle, allowing you to use your thumb and forefinger to turn and tighten the screw easily without a screwdriver or wrench.
What materials are these screws available in?
These screws are commonly available in galvanized steel for corrosion resistance and nylon for insulation and lightweight applications.
Are they suitable for high-vibration environments?
While they provide excellent fastening force, butterfly screws are primarily designed for convenience. In very high-vibration industrial settings, periodic manual checks are recommended to ensure they remain tight.
Can galvanized butterfly screws be used outdoors?
Yes, the galvanized coating provides a protective layer against rust and environmental elements, making them suitable for outdoor furniture and equipment.
What sizes can I choose from?
We offer a range of nominal diameters including 10#, 1/4, 5/16, 3/8, 7/16, 1/2, and 5/8 to accommodate various project requirements.
Does moisture affect nylon butterfly screws?
Nylon has hygroscopic properties, meaning it can absorb moisture which might slightly change its mechanical properties like tensile strength. It is best used in controlled environments or treated with weather-resistant additives.

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