UNC Taps | McMaster-Carr

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System of Measurement

Thread Size

For Use On

Stainless Steel

Chamfer Type

Flute Type

Number of Flutes

Thread Direction

Right Hand and Left Hand

For Hole Type

Finish

Aluminum Titanium Nitride (AlTiN) Coated

Chromium Carbide (CrC) Coated

Titanium Aluminum Nitride (TiAlN) Coated

Titanium Carbon Nitride (TiCN) Coated

Titanium Nitride (TiN) Coated

Sold As

Material

18-8 Stainless Steel

Thread Type

Metric Trapezoidal

Maximum Tapping Depth

Application

Thread Repairing

Shank Type

Overall Length

Pitch Diameter Limit

Thread Length

Tap Sizes Included

0-80, 1-64, 1-72, 2-56, 2-64, 3-48, 3-56, 4-40, 4-48

1 each of sizes 0-80, 1-64, 1-72, 2-56, 2-64, 3-48, 3-56, 4-40, 4-48

1 each of sizes 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, and 1/2"-20

1 each of sizes 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, and 1/2"-13

1 each of sizes 4-40, 6-32, 8-32, 10-24, 10-32, 1/4"-20, 5/16"-18, 3/8"-16, 1/2"-13, and 5/8"-11

1 each of sizes 4-40, 6-32, 8-32, 10-24, 10-32, and 1/4"-20

1 each of sizes 6-32, 6-40, 8-32, 8-36, 10-24, 10-32, 12-24, 12-28, 1/4"-20, 1/4"-28

1 each of sizes 6-32, 8-32, 10-24, 10-32, 1/4-20, 5/16-18, 3/8-16, 7/16-14, and 1/2-13

1 each of sizes 6-40, 8-36, 10-24, 10-32, 1/4-28, 5/16-24, 3/8-24, 7/16-20, and 1/2-20

Component

Number of Pieces

Drill Bit Size

REACH

Export Control Classification Number (ECCN)

DFARS Specialty Metals

RoHS

Compliant with Exemptions

How can we improve?

1,101 Products

Taps

For Fastener Threads

Taps

Cut threads into holes in most metals and plastic so screws, bolts, and rods fit snugly

Chip-Clearing Taps

Chip-Clearing Taps

Remove long, stringy chips to produce cleaner threads than standard taps

Tap Sets

A variety of taps for threading holes so screws, bolts, and rods fit snugly

Chip-Clearing Taps for Steel and Stainless Steel

Chip-Clearing Taps for Steel and Stainless Steel

Made of a high-vanadium alloy for hardness and wear resistance

Chip-Clearing Tap Sets

Chip-Clearing Tap Sets

A range of sizes that remove chips so they don’t ruin the threads or jam the tap

Chip-Free Taps

Press instead of cut threads for zero chips to slow you down or damage the tap

Chip-Clearing Taps for Aluminum, Brass, and Bronze

Chip-Clearing Taps for Aluminum, Brass, and Bronze

Long, gummy strands from soft metals won’t get stuck on the tap or in the hole

Long-Reach Taps

Long-Reach Taps

Thread holes that are hard to access or where obstructions make it difficult to turn a tap wrench

Long-Reach Chip-Clearing Taps

Long-Reach Chip-Clearing Taps

Push out chips while threading holes that are hard to reach or obstructed

Left-Hand Thread Taps

Left-Hand Thread Taps

Create left-hand threads that prevent counter-clockwise rotating parts from loosening

Oversized Chip-Clearing Taps

Oversized Chip-Clearing Taps

Get chips out of the way as you cut slightly oversized threads for plating and heat treating

Chip-Clearing Taps for Titanium

Chip-Clearing Taps for Titanium

Cut through tough titanium alloys while reducing heat and preventing clogs

Chip-Clearing Taps for Nickel

Chip-Clearing Taps for Nickel

Avoid heat buildup that can deform material and prematurely wear taps when threading nickel alloys

Left-Hand Thread Tap Sets

Left-Hand Thread Tap Sets

A variety of taps to create a snug fit with left-hand fasteners

Hex-Bit Taps

No tap wrench needed—just snap into a bit screwdriver

Left-Hand Thread Chip-Clearing Taps

Left-Hand Thread Chip-Clearing Taps

Prevent chip buildup when creating left-hand threads for counter-clockwise rotating parts

Oversized Taps

Prepare for plating and heat treating by cutting slightly oversized threads

For Helical Inserts

Helical Insert Taps

Helical Insert Taps

Match the size of helical inserts so they fit tightly when installed

Left-Hand Thread Helical Insert Taps

Left-Hand Thread Helical Insert Taps

Size holes for installing helical inserts that anchor left-hand bolts and rods

Other Products

Tap, Die, and Drill Bit Sets

Tap, Die, and Drill Bit Sets

Cut and repair internal and external threads and drill holes in many different sizes

Tap and Drill Bit Sets

Tap and Drill Bit Sets

Drill holes and cut internal threads in a variety of sizes

Tap and Die Sets

Tap and Die Sets

Cut and repair internal and external threads in many sizes

Drill Taps

Drill and thread holes with the same bit

Tap, Die, and Thread File Sets

Tap, Die, and Thread File Sets

Repair internal and external threads in a range of sizes

Thread Mills

Install in a CNC machine to cut a range of internal and external threads with a single tool

Thread Repair Tools

Thread Repair Tools

Restore lengths of rusted and damaged threads on screws, pipe, or conduit

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

Tap Guides

Place on your workpiece to cut straight threads without building a fixture

Locknuts

Hold fasteners in place to prevent loosening from vibration

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)