3 8 expansion bolts

Butterfly screws, also known as wing nuts or butterfly nuts, are a distinctive type of fastener that have gained popularity in various engineering and design applications due to their unique shape and functionality. These screws derive their name from their appearance, which resembles a butterfly in flight when the wings are fully opened. The wings serve as handles, allowing for quick and easy tightening or loosening by hand without the need for additional tools.

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A tek screw, also known as self-drilling screw, is equipped with a drill-like point that allows it to create its pilot hole as it is driven into materials. This eliminates the need for pre-drilling, which can streamline the construction process significantly. The 5 designation typically refers to specific measurement protocols related to the screw's dimensions and strength characteristics. However, the specific meaning of 5 often involves manufacturer specifications or industry standards, allowing for slight variations in size and application based on regional or production practices.


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In construction, long self-drilling screws are frequently employed in roofing, cladding, and framing applications due to their strength and ease of uselong self drilling screws. They excel in situations where quick, secure fixings are required, such as in steel-to-steel connections or when attaching timber frames to concrete. In the automotive and manufacturing sectors, they are used for assembling components, offering a robust and efficient solution.

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Butterfly anchors also offer excellent versatility, making them suitable for use in a wide range of marine environments3 16 butterfly anchor. Whether you're anchoring your boat in a crowded marina or a secluded cove, these anchors can provide the stability and security you need. Their compact size and lightweight design make them easy to handle and store, making them an excellent choice for both experienced sailors and those who are just starting out.

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