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40-piece tap and die set in PE plastic storage case

VEVOR

VEVOR 40-Piece Tap and Die Set M3-M12 Bearing Steel

SKU CH-DAMS-2J7M1

40-piece metric threading kit with hardened bearing steel taps and dies covering M3 to M12 sizes

  • TypeOther Appliances
  • Width2.17
  • HRC55-62 hardened bearing steel resists wear and corrosion
  • CNC machining plus 800 heat treatment delivers precise, smooth threads
  • 17 taps and 17 dies cover metric sizes M3 to M12
  • Includes die handle, tap wrench, T-handle, pitch gauge and screwdriver
  • PE plastic storage case keeps all 40 pieces organised

Metric Threading Kit M3–M12

This 40-piece tap and die set covers metric sizes from M3 to M12 and includes a 1/8-27 NPT option. It supplies 17 taps and 17 dies plus handles, wrenches, a screw pitch gauge and a screwdriver in a PE plastic case. The kit targets mechanics and hobbyists who cut internal and external threads on site.

Hardness Range Limits Use on Harder Alloys

Taps and dies are hardened to HRC55-62 after an 800 heat treatment and CNC machining. That hardness suits mild steel, aluminium and plastics but will not reliably cut materials hardened above the same range. The double-polished finish reduces friction yet cannot overcome the fundamental hardness ceiling of the tool steel itself.

17 Metric Sizes Define Coverage

The set provides exactly 17 distinct metric thread pitches including fine variants such as M3x0.5, M6x0.75 and M12x1.5. If a project requires threads outside the M3–M12 window or additional fine pitches not listed, this kit will not cover the job.

Highlights

  • HRC55-62 hardened bearing steel resists wear and corrosion
  • CNC machining plus 800 heat treatment delivers precise, smooth threads
  • 17 taps and 17 dies cover metric sizes M3 to M12
  • Includes die handle, tap wrench, T-handle, pitch gauge and screwdriver
  • PE plastic storage case keeps all 40 pieces organised

Specifications

TypeOther Appliances
Width2.17

Questions about this item

Which thread sizes does the 40-piece set cover for metric and NPT threads?

The set includes 17 taps and 17 dies covering M3 to M12 in pitches from 0.5 to 1.75, plus a 1/8-27 NPT size, all stored with handles, wrenches, a pitch gauge and screwdriver.

How does HRC55-62 hardness affect thread-cutting performance in a workshop?

The hardened bearing steel resists wear and corrosion under heavy loads, keeping cutting edges sharp through repeated use on tough materials and in harsh environments.

What does the 800 heat-treatment step do for tap and die accuracy?

The 800 heat-treatment combined with CNC machining and double polishing creates precise, ultra-smooth threads that reduce friction and extend tool life.

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