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Silver steel 5/16"-22 HSS plug tap with fluted shaft and square drive end

Drill America

Drill America 5/16"-22 HSS plug tap

SKU CH-ENRP-W6YBR

HSS plug hand tap cuts 5/16"-22 threads in through holes for general machine or CNC tapping

  • HSS construction resists wear during repeated threading
  • 5/16"-22 size matches specific thread requirements
  • Plug style suits through-hole tapping tasks
  • Taper start aligns threads square with workpiece
  • California Prop 65 warning for chemical awareness

Threading tool for 5/16"-22 holes

This Drill America HSS plug tap cuts internal threads in 5/16"-22 holes. It is made from high-speed steel for general machine or CNC tapping. The plug style suits through-hole work. It is intended for machinists and maintenance technicians who need to create or repair threads in metal components.

Plug style limits blind-hole use

The plug chamfer starts threads square with the workpiece but does not generate threads to the bottom of a blind hole. A bottoming tap is required when threads must reach full depth in a closed hole. This tap is therefore restricted to through-hole applications or as an intermediate step before a bottoming tap.

5/16"-22 size with .3125 decimal equivalent

The single specification that determines fit is the 5/16"-22 thread size with a .3125 decimal equivalent. Only holes drilled for this exact size and pitch will accept the tap correctly. Buyers who need a different diameter, pitch or thread standard cannot use this tool.

How it compares

Measured against everything we stock in Garden Hoses & Pipe Tubing, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 80% of the 973 comparable items (median $21.99).

Specifications

Product
Brand nameDRILL AMERICA

Questions about this item

Should I pick the taper, plug, or bottom style for a through-hole in 5/16"-22?

The plug style is designed for through-holes and starts threads easily in 5/16"-22 material.

What does the 3125 decimal equivalent tell me about the 5/16"-22 tap in use?

It confirms the major diameter is 0.3125 inch, matching a standard 5/16" drill size for correct hole preparation.

How does the HSS construction affect thread cutting in 5/16"-22 holes?

High-speed steel resists wear and heat, allowing repeated cuts in steel, aluminium, and most common metals at 22 threads per inch.

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