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Cle-Line C00768 straight flute hand tap plug 3 flutes #2-56 UNC bright finish

Cle-Line

Cle-Line C00768 Straight Flute Hand Tap Plug 3 Flutes #2-56 UNC

SKU CH-HX53-2SKSY

Cuts #2-56 UNC threads with a 1.75 in plug tap made from bright high-speed steel

  • #2-56 UNC thread for precise small-hole tapping
  • Plug chamfer starts threads easily in through holes
  • Three straight flutes clear chips efficiently
  • High-speed steel construction resists wear on repeated use
  • Bright uncoated finish suits general-purpose applications

Thread Size #2-56 UNC

This straight-flute hand tap cuts internal Unified National Coarse threads in a #2-56 size. It is designed for manual tapping operations in maintenance, repair or light production work. The plug chamfer starts threads easily in through-holes or blind holes with adequate clearance. Machinists and hobbyists use it to create new threads or restore damaged ones in metal parts.

Three Flutes and H2 Limit

Three flutes provide chip clearance while maintaining cutting strength in ductile materials. The H2 thread limit and Class 2B fit produce a standard tolerance suitable for general-purpose fastening. A 75 percent thread drill size of 1.73 mm prepares the hole for proper thread engagement. The bright uncoated high-speed steel surface works with cutting fluid to reduce friction.

Plug Chamfer and Length Constraints

The plug chamfer requires enough hole depth beyond the full-thread region to start the cut cleanly. Overall length is 1.75 in with a thread length of .44 in, limiting reach in deep or obstructed holes. Blind holes must allow space for chips to collect ahead of the tap tip. Users needing bottoming action or longer reach must select a different tap style.

How it compares

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

Price $11.99
Cheaper than about 84% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLE-LINE

Questions about this item

When will the #2-56 UNC tap need replacement?

Replace the tap when the cutting edges dull or the H2 thread limit no longer produces a 2B class of fit, typically after repeated use in harder materials.

What limit appears first during sustained tapping with this #2-56 UNC tool?

The 0.44 in thread length and 1.75 in overall length restrict the maximum depth you can cut in a single pass.

How much heat does the HSS tap generate during all-day use?

High Speed Steel construction resists heat buildup, but continuous cutting without lubrication will raise temperature and accelerate wear.

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