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Whether you're building custom jigs, restoring vintage machinery, or tackling a weekend woodworking project, our bright zinc-plated BSW wing nuts offer the quick, tool‑free fastening you need. This assortment covers four essential diameters—3/16", 1/4", 5/16", and 3/8"—to fit a wide range of British Standard Whitworth screws. Say goodbye to fumbling with wrenches in tight spaces and enjoy secure, hand‑tight adjustments every time.
| Material | Carbon Steel |
| Finish | Bright Zinc Plated (clear chromate) |
| Thread Standard | BSW (British Standard Whitworth) / Inch |
| Sizes Included | 3/16", 1/4", 5/16", 3/8" |
| Nut Type | Wing Nut / Butterfly Nut |
| Package | Assortment pack (sizes as listed) |
| Country of Origin | China |
They are designed exclusively for British Standard Whitworth (BSW) screws in the matching fractional inch sizes: 3/16", 1/4", 5/16", and 3/8". The thread pitch follows the original Whitworth profile—please confirm your bolt is BSW, not UNC or metric, to ensure a proper fit.
The bright zinc plating provides good indoor corrosion resistance and light outdoor protection. For permanent outdoor exposure or marine environments, we recommend occasional maintenance or upgrading to stainless steel hardware. In covered patios or sheds, these wing nuts hold up very well.
Absolutely—that’s one of their most popular uses. The tool‑free wing design lets you quickly reposition stops, fences, and hold‑downs. Pair them with BSW threaded rod or bolts, and you have an instantly adjustable clamping system.
The assortment includes a mix of the four listed BSW sizes, giving you a practical shop selection. For the exact count and breakdown, please refer to the listing photos and quantity selection—the packaging is labeled to help you identify each diameter at a glance.
No, they are not interchangeable. BSW uses a 55‑degree thread angle and a different pitch (threads per inch) than UNC, which has a 60‑degree angle. Attempting to force a mismatched thread can damage both the nut and the bolt. Always verify your fasteners are marked BSW or Whitworth.
