#22 Diameter Screws

Welcome to the “22-Diameter Screws” collection at Old West Iron. This category is organized by shank (thread) diameter — screws labeled “#22” — rather than by head size or style. In standard U.S. screw sizing, the “#22” designation refers to the outside thread diameter (major diameter) of the screw.

While standard published screw-size charts typically list gauge sizes only up through #20 for general wood screws, grouping a “22-Diameter” collection allows us to handle specialized fasteners or custom orders that match or approximate a #22 (or roughly 0.344" / 11 mm major-thread diameter) — useful when a project demands extra-stout strength, large timbers, or heavy structural loads.

FAQ

Q: What does “#22” mean on a screw?
A: The “#22” refers to the screw’s gauge — that is, the nominal diameter of the screw’s threads (major or outside-thread diameter), not the head size or style. 

Q: Why are screws grouped by shank/ thread diameter instead of head size?
A: Because the thread (shank) diameter determines the screw’s structural strength, load-bearing capacity, and what pilot-hole or clearance hole you’ll need. Head size or style affects appearance or how the screw sits, but not its fundamental diameter or strength. 

Q: For what kinds of projects would a #22 (or equivalent) screw be used?
A: Such screws are best suited for heavy-duty, load-bearing applications: thick lumber framing, large timbers, heavy structural assemblies, decks or exterior structures, barns, or any build requiring maximum holding strength and durability.

Q: Will screws under “22-Diameter” vary in head type or length?
A: Yes — because the collection is organized by diameter only, you may find different head styles (flat-head, round-head, decorative, etc.) or different lengths. Head design and length determine how/where the screw installs and how it looks; diameter determines structural capacity.

Q: Do I need to pre-drill a pilot hole for screws in this diameter range?
A: Yes — especially when working with hardwoods or dense timbers. A pilot hole sized to just under the screw’s root or minor-thread diameter helps prevent splitting and ensures the screw threads bite cleanly for maximum holding strength.