Q: Are these wing bolts strong enough for metal-to-metal clamping?
A: Absolutely. They are made from carbon steel with a zinc-plated finish. While the wing head limits the torque you can apply by hand (compared to a hex bolt with a wrench), they provide more than enough hand-tightening force for brackets, panels, machine guards, and woodworking jigs. For heavy structural loads, we recommend verifying the thread engagement, but for typical workshop and DIY applications, they perform excellently.
Q: Do these rust easily? Can I use them outdoors?
A: The clear zinc plating offers good corrosion resistance for indoor and sheltered outdoor environments. They resist surface rust in garages, basements, and covered patios. For constant exposure to rain or saltwater, stainless steel wing bolts would be a better choice, but for general-purpose use, these hold up very well.
Q: How do I know which length to choose ā is it total length or just the threaded portion?
A: The listed length (e.g., 20mm, 40mm) refers to the total thread length from under the wing head to the tip of the bolt. The wing head height is not included in that measurement. Please measure the thickness of the material you're clamping and add a few millimeters for nut engagement or threaded insert depth.
Q: Are M4, M6, and M10 all included in one pack, or do I order separately?
A: Our listings are set up by individual size (or pre-configured kits). Please use the variation selector (e.g., "M6 x 20mm") to pick your exact diameter and length. You can order multiple sizes in a single purchase ā just add each variation to your cart. If you need a custom assortment, feel free to message us.
Q: Will the zinc plating wear off if I tighten and loosen them repeatedly?
A: The zinc layer is durable, but like any plated fastener, extremely frequent metal-to-metal friction (especially on rough threads) may eventually cause wear at the contact points. For most adjustment applications ā such as table saw fences or 3D printer beds ā they last for years without issue. A tiny dab of light oil on the threads will extend the plating life further.
