1/4"-20 Taps | McMaster-Carr

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System of Measurement

Thread Size

For Use On

Stainless Steel

Chamfer Type

Number of Flutes

For Hole Type

Flute Type

Maximum Tapping Depth

Thread Direction

Thread Type

Material

18-8 Stainless Steel

Tungsten Carbide

Sold As

Finish

Chromium Carbide (CrC) Coated

Titanium Aluminum Nitride (TiAlN) Coated

Titanium Carbon Nitride (TiCN) Coated

Titanium Nitride (TiN) Coated

Shank Type

Quick-Change Hex

Component

Installation Tool

Overall Length

Number of Pieces

Tap Sizes Included

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

1/4"-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

Thread Length

Pitch Diameter Limit

Drill Bit Size

RoHS

Compliant with Exemptions

Export Control Classification Number (ECCN)

REACH

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

DFARS Specialty Metals

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119 Products

Taps

For Fastener Threads

Taps

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

Tap Sets

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

Chip-Clearing Taps

Chip-Clearing Taps

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

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

Long-Reach Taps

Long-Reach Taps

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

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 Chip-Clearing Taps

Long-Reach Chip-Clearing Taps

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

Hex-Bit Taps

No tap wrench needed—just snap into a bit screwdriver

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

Left-Hand Thread Tap Sets

Left-Hand Thread Tap Sets

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

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

Oversized Taps

Prepare for plating and heat treating by cutting slightly oversized threads

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

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

Tap, Die, and Thread File Sets

Tap, Die, and Thread File Sets

Repair internal and external threads in a range of sizes

Tap Extractors

Grip the flutes on a broken tap to remove it without damaging the surrounding threads

Drill Taps

Drill and thread holes with the same bit

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

Tapping Heads

Back out of a hole after tapping it without stopping your machine's motor

Friction Drill Bits

Friction Drill Bits

Pair with friction drills to melt holes that have an outer lip in sheet metal

Locknuts

Hold fasteners in place to prevent loosening from vibration

T-Slotted Framing and Fittings

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

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