What sizes does this cover?

The Socket & Wrench Size pack covers standard metric hex bolts from M3 to M36 and imperial hex bolts from 1/4" to 1-1/2". These are the most common sizes in hardware stores and automotive work.

Are these sizes guaranteed correct?

Sizes are based on ISO and SAE standards for standard hex head bolts and nuts. Actual fasteners vary by manufacturer, grade, and application. Always verify with the fastener when precision matters.

What about Torx, spline, or specialty fasteners?

This tool covers hex head fasteners only. Torx, spline, 12-point, and other drive types are not yet supported.

Can I use the nearest imperial socket on a metric bolt?

In a pinch it may work, but risks rounding the fastener head. Use the correct socket whenever possible. Related values shown are for reference, not substitution.

Will more packs be added?

Yes. Pilot Hole, Tap Drill, and Metric/Imperial conversion packs are planned. The architecture supports new reference sets without changing the app.

#4 Sheet Metal Screw Pilot Hole — 3/32"

A #4 sheet metal screw needs a 3/32" pilot hole.

Result

Answer

3/32" drill bit

Standard

Buy3/32" drill bit Drill bit set Step drill set

Screw Gauge#4

Shaft Diameter0.112"

Pilot Hole (thin gauge)3/32"

Pilot Hole (thick gauge)7/64"

A #4 sheet metal screw (0.112" shaft) needs a 3/32" pilot hole in thin gauge material or 7/64" in thick gauge. Light sheet metal, HVAC ductwork.

Note

Pilot hole size depends on material thickness. Thin gauge (up to 18 ga) uses the smaller hole; thick gauge (16 ga and heavier) uses the larger.

Related Sizes

#6 sheet metal →

About #4 Sheet Metal Screw Pilot Holes

A #4 sheet metal screw has a shaft diameter of 0.112". For thin gauge material (up to 18 ga), drill a 3/32" pilot hole. For thick gauge material (16 ga and heavier), use a 7/64" pilot hole. Light sheet metal, HVAC ductwork. Sheet metal screws are self-tapping, but a pilot hole ensures clean entry and prevents the metal from deforming.

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