Screw and Tool Specifications
Look up Metric and Imperial screw diameter, pitch, tap drill, and clearance drill sizes.
Data last maintained
Screw and Tool Specifications
Look up Metric and Imperial screw diameter, pitch, tap drill, and clearance drill sizes.
Data last maintained
About Screw and Tool Specifications
Metric and imperial thread references
The table covers common metric and imperial screw references, including diameter, coarse or fine pitch, TPI where relevant, tap drill size, and general clearance drill size. It is intended as a compact lookup for labeling parts, checking a chart, or preparing a parts list.
Switch category and search values
Choose metric or imperial to switch the column set, then search by size name, diameter, pitch, tap drill, clearance value, or other row text. The share button keeps the current page available for quick handoff, while the table itself stays a static reference.
Not torque or repair guidance
Fastener choice depends on material, load, thread class, coating, tolerance, tool condition, and safety requirements. This reference does not provide torque specs, structural ratings, vehicle repair instructions, or load-bearing approval; confirm critical work with the part maker, equipment manual, or qualified technician.
FAQ
Common questions and answers about this topic.
What is Screw and Tool Specifications?
It is a quick reference guide for common screw sizes, including Metric (M) and Imperial (UNC/UNF) standards, providing details on diameter, pitch, and recommended drill bit sizes.
Is this tool free to use?
Yes, this tool is completely free to use.
Data Sources
This tool's data is compiled from the authoritative sources below.
- ISO 261:1998 - ISO general purpose metric screw threads(opens in a new tab)
- ISO 262:2023 - Selected metric fastener thread sizes(opens in a new tab)
- ISO 273:1979 - Clearance holes for bolts and screws(opens in a new tab)
- ASME B1.1 - Unified Inch Screw Threads(opens in a new tab)
- ASME B18.2.8 - Clearance Holes for Bolts, Screws, and Studs(opens in a new tab)
- Guhring - Tap Drill Calculator and Guidance(opens in a new tab)
- American Fastener - Tap and Drill Size Chart(opens in a new tab)
- Albany County Fasteners - Clearance Hole Chart(opens in a new tab)
Data last maintained