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Cleveland straight-flute hand tap, 5/8"-18 UNF, plug, H3, bright high-speed steel

Cleveland

Cleveland C60831 Straight Flute Hand Tap 5/8"-18 UNF Plug H3

SKU CH-R9S9-59YHT

Straight-flute hand tap cuts 5/8"-18 UNF threads in a 3.81 in overall length with a 1.81 in thread length, high-speed steel construction and H3 limit for Class 2B fit

  • Product typeTaps
  • Creates precise UNF threads with 5/8"-18 pitch
  • Plug chamfer starts threads easily in through holes
  • High-speed steel resists wear during repeated hand tapping
  • H3 thread limit ensures Class 2B fit accuracy
  • 81 in thread length suits standard tapping depths

Cleveland C60831 Straight Flute Hand Tap

This Cleveland C60831 straight flute hand tap cuts 5/8"-18 UNF threads in a single pass. Machinists and maintenance technicians use it for through-hole and blind-hole tapping in steel and non-ferrous metals. The H3 limit produces a 2B class of fit for standard assemblies.

Plug chamfer and bright high-speed steel

The plug chamfer starts threads easily and clears chips forward in through holes. Bright uncoated high-speed steel resists wear in general-purpose cutting without the added cost of a surface coating. The 75 percent thread drill size of 13.60 mm simplifies drill selection for the operator.

Thread limit H3 for 2B class of fit

The H3 thread limit determines whether the finished thread meets the 2B class of fit required by the drawing. Selecting a different limit would produce a loose or tight assembly that fails inspection. Verify the limit before ordering.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $38.99
Pricier than about 61% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND
Product typeTaps

Questions about this item

How often will the H3 thread-limit tap need replacing in high-volume threading?

The H3 limit tap is made from high-speed steel and will wear gradually; replace it once the 5/8"-18 threads no longer gauge to the 2B class of fit.

What stops continuous tapping first — chip packing or tool deflection?

The straight-flute design lacks chip-breaking geometry, so chips pack in the 1.81 in thread length and stall the cut before deflection becomes an issue.

Does the bright uncoated finish run hotter than coated taps during all-day use?

The uncoated high-speed steel generates more friction heat, so cutting fluid is essential to keep the 3.81 in tool from overheating in sustained operation.

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