#10 Diameter Screws

Welcome to the “10-Diameter Screws” collection at Old West Iron. This section organizes our screws by shank diameter (gauge) — in this case, screws with a #10 gauge — rather than by head size or style. A #10 screw has a shank/major thread diameter of about 0.190 inches (≈ 3/16 in, ~4.8 mm). 

These #10 screws are solid mid-to-heavy-duty fasteners — thicker than #8 and #6 — and are well suited for applications requiring stronger hold and structural integrity: framing, heavier furniture, load-bearing wood assemblies, decking, or other projects where durability and strength matter.

FAQ

Q: What does “#10” mean on a screw?
A: “#10” is the gauge number, indicating the screw’s shank (outer-thread) diameter. It does not refer to head size or style. 

Q: Why are the screws grouped by shank diameter instead of head size?
A: Because the shank diameter determines the screw’s structural strength, holding power, and the size of pilot-holes or clearance holes. Head size or style affects only how the screw sits in or on the surface — not its gauge or strength. 

Q: What kinds of projects suit a #10 screw?
A: #10 screws are ideal for heavier-duty woodworking or construction tasks: building furniture that bears weight, framing, decking, structural assemblies, or anywhere you need reliable, sturdy connections.

Q: Will screws under #10 always look the same?
A: Not necessarily — within the #10 grouping you may find different head styles (flat, round, countersunk, decorative, etc.). Head style affects appearance or how the screw sits, but not the screw’s gauge or basic structural capacity.

Q: How do I choose screw length when using a #10 screw?
A: Choose a length that allows the screw tip to penetrate sufficiently into the second piece of wood for a strong hold — often at least halfway or more into that piece. Also ensure the screw length plus head doesn’t exceed material depth.