Stainless Steel Wing Nut
Definition and Application
A stainless steel wing nut (also known as a butterfly nut) is a type of fastener with two wing-like projections, designed for hand tightening and loosening without tools. Made from corrosion-resistant stainless steel (e.g., 304/1.4301, 316/1.4401), it is widely used in industries requiring durability, anti-rust properties, and easy adjustment, such as machinery, electronics, automotive, and architectural fixtures.
Key Features
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Material Advantages
- Corrosion Resistance: Stainless steel (e.g., 304/A2-70, 316/A4-70) withstands moisture, chemicals, and high temperatures, suitable for harsh environments.
- Mechanical Strength: Complies with standards like GB/T 3098.15 for tensile strength and hardness (e.g., A2-70 nuts have min. 700 MPa tensile strength).
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Design Characteristic
- Wing Structure: Ergonomic wings enable quick manual operation, ideal for applications needing frequent assembly/disassembly.
Standards and Dimensions
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International Standards:
- GB/T 62-1988 (China): Specifies dimensions for Type 1 and Type 2 wing nuts (e.g., M5-M20, with wing width D and thickness m).
- DIN 315 (Germany): Similar to GB/T 62 but with slight tolerances; applicable to European markets.
- ASME B18.22.1 (US): Defines imperial sizes and wing profiles.
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