Wing Bolt Butterfly Screw

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Wing Bolt Butterfly screw is also called butterfly ingot screw, horn bolt or butterfly hand screw. The main body is made of 304 stainless steel. It is a fastener that can be manually operated through a wing-shaped expansion design. Its unique "butterfly wing" structure abandons the reliance on traditional tools and shows excellent operating convenience in narrow spaces and high-frequency disassembly and assembly scenarios. Now let's analyze this fastener product.

Basic definition: The main body of the wing bolt butterfly screw is made of 304 stainless steel, formed by cold heading/red pressing process16, with threaded connection function and double-wing hand-held structure. Because of its differences in appearance and functional characteristics, it is called differently in different scenarios. It is called ingot nut in the building decoration and furniture industry, hand screw in the machinery equipment maintenance and electrical cabinet installation industry; and horn anti-loosening bolt in marine equipment and vibration equipment.

Functional value: Wing bolts Butterfly screws can achieve three core functions - fastening connection, tightness adjustment (controlling preload by rotating butterfly gaskets), and anti-loosening fixation. It has been widely used in four scenarios: deck equipment fixation in shipbuilding, quick opening and closing panels for mechanical maintenance, weather-resistant structural connection of outdoor facilities, and medical equipment (no tool disinfection requirements).

Product Picture

 

Material advantages: 304 stainless steel is chosen as the material because it has performance advantages far ahead of carbon steel.

Corrosion resistance: Chromium-nickel alloy can effectively isolate chloride ions and acidic media corrosion on the surface. It can pass the 96-hour neutral salt spray test (ASTM B117) without red rust, and its service life is ≥10 years in an environment with humidity greater than 85%.

High hardness and deformation resistance: Its Vickers hardness reaches 210-280, which is 35% higher than copper alloy. In repeated tightening

operations: the number of anti-slipping threads is greater than 50 times, and the ultimate tensile strength is ≥515MPa

Environmental safety: RoHS 2.0 certified, no toxic substances are released; therefore, it is suitable for food machinery.

Raw Material

Cold Forging

Threading

Auto Lathe

Auto Lathe

Table Lathe

CNC Lathe

Quality Checking

Inspection

Packing

The wing-shaped structure of the butterfly bolt is essentially a perfect combination of ergonomics and mechanical efficiency. Compared with traditional hexagonal bolts, its operational advantage is very intuitive. Its double-wing design can provide a holding torque of ≥15N·m, and can be operated barehanded; the feasibility of blind operation is very high, and the direction of the wing can be identified by touch, and the working efficiency in dark environments can be greatly improved.

Using 304
In some production line transformation projects, it can bring direct benefits: reduced tool costs, saved labor hours, and reduced unexpected downtime.

We can provide customized industry solutions for in-depth development of specific scenarios:
Special for ships: add cathodic protection slots to match the hull potential

Clipers Micrometer

Torque

Depth Micrometer

Plug

Thread Guage

Ring Guage

Hardness Tester

Projector

Salt Spray Testing

Medical equipment version: rounded corner design (R angle ≥ 1mm) to avoid scratches

Outdoor logo fixation: equipped with anti-theft inner hexagonal groove (anti-dismantling structure)

As a company that has been deeply engaged in fastener manufacturing for more than 16 years, we provide full-process customized development services to help customers solve connection problems under special working conditions: we can provide 304/316 material development, as well as special-shaped processing and heat treatment, and pass the three comprehensive tests of salt spray/pulling force/torque.

The specific classification of our products regarding the neutral salt spray test without red rust is natural polished version: ≥96 hours, nickel-plated version: ≥240 hours. The test standard is ASTM B117, ambient temperature 35±2℃, 5% NaCl solution.

Choose our core value
As a professional-grade 304 wing bolt butterfly screw manufacturer, Zeyao takes material authenticity as the foundation (SGS material report is provided for each batch), and provides connection solutions for your special working conditions with customized capabilities. Whether it is the anti-corrosion requirements of marine equipment or the tool-free operation scenarios of medical equipment, Zeyao Hardware will continue to output reliable connection power. If you have relevant procurement and customization requirements, please let us know.