ASME B18.17 — Wing Nuts, Thumb Screws, and Wing Screws
Standard: ASME B18.17
ASME B18.17 standardizes inch-series wing nuts, thumb screws, and wing screws — the hand-tightened fasteners for tool-free assembly.
What It Covers
- Wing nut types (regular, cold-forged)
- Thumb screw head styles
- Wing screw dimensions
- Materials and finishes