Allen Screwdriver Bits | McMaster-Carr

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	For Drive Style For Drive Style


Hex	Tamper- Resistant Hex	External Hex

	System of Measurement System of Measurement

Inch

Metric

in.-lbs.

	Size Size

	Driver Style Driver Style


Bit	Driver

Shaft

	Overall Length Overall Length

	Individual/Set Individual/Set

Individual

Set

	Tip Style Tip Style


Standard	Ball

	Shank Type Shank Type

	Hex Shank Size Hex Shank Size

1/4"

5/16"

4mm

	Number of Pieces Number of Pieces

4
5
6
7
8
9
10
11

12
13
14
16
18
27
29
30

32
34
35
39
40
50
51
100

	Container Type Container Type

	Square Drive Size Square Drive Size

	Material Material

Steel

Stainless Steel

	For Screw Size For Screw Size

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Torque Adjustability Torque Adjustability

Adjustable

	Maximum Torque Maximum Torque

	Grip Style Grip Style


Plain	Ultra Grip

Cushion

	Minimum Torque Minimum Torque

	Drive Type Drive Type

Manual

Impact

Nonimpact Power

	For Bit Hex Shank Size For Bit Hex Shank Size

931 Products

Bits

Hex Bits

Strong and durable, these multipurpose bits are for use with bit screwdrivers.

Hex Bits for Impact Drivers

The toughest bits available, these withstand the shock and twisting force of impact drivers.

Ball-End Hex Bits

When you don't have exact alignment between the fastener and the tool, the ball end allows angled entry to turn screws in hard-to-reach areas.

Hex Bits for Stainless Steel Screws

Protect your stainless steel screws by using a stainless steel bit. If steel flakes off a standard bit and into the recess, it can lead to rust and contamination. These bits eliminate that risk.

Ball-End Screw-Holding Hex Bits

When you don't have exact alignment between the fastener and the bit, the ball end allows angled entry to turn screws in hard-to-reach areas. A retaining ring grips inside the recess to hold screws in place.

Screw-Holding Hex Bits

A retaining ring at the tip grips inside the recess to ensure screws won't slip off the bit.

Tamper-Resistant Hex Bits

An opening at the tip accommodates the pin in the recess of tamper-resistant hex screws. These are also known as pin-in-hex or pin-in-socket bits.

Fastener-Holding Nutdriver Bits

A magnet or retaining ring holds the nut in place.

Extra-Grip Fastener-Holding Nutdriver Bits

Because they make contact on the flat sides of fasteners rather than only on the corners, these magnetic bits significantly reduce slipping and stripping. They’re also known as lobular bits.

Fastener-Holding Nutdriver Bits for Impact Drivers

The toughest bits available, these withstand the shock and twisting force of impact drivers. A magnet holds the nut in place.

Nutdriver Bits

Turn hex nuts and cap screws.

Bit Sets

Bit Assortments

Assortments contain bits with multiple drive styles.

Bit Assortments for Impact Drivers

The toughest bits available, these withstand the shock and twisting force of impact drivers.

Precise-Control Bit Assortments

The knurled shank on these bits allows finger tightening. They can also be used with the included screwdriver.

Hex Bit Sets

Ball-End Screw-Holding Hex Bit Sets

A retaining ring grips inside the recess to hold screws in place. These bits have a ball end that allows angled entry to drive screws in hard-to-reach areas.

Ball-End Hex Bit Sets

When you don't have exact alignment between the fastener and the tool, the ball end allows angled entry to turn screws in hard-to-reach areas.

Fastener-Holding Nutdriver Bit Sets

A magnet holds the nut in place.

Nutdriver Bit Sets

These bits are also known as nut setters.

Tamper-Resistant Hex Bit Sets

An opening at the tip accommodates the pin in the recess of tamper-resistant hex screws. These are also known as pin-in-hex or pin-in-socket bits.

Torque-Measuring Bit Adapters

Eliminate the need for multiple bulky tools with these bit adapters. At less than 3 inches long, these compact adapters convert ¼” bit screwdriver handles and ¼” bits into torque screwdrivers so you can fasten to a specific torque.

Bit Screwdrivers

Insert a bit into the shaft and a magnet holds it in place.

Tight-Clearance Ratcheting Bit Screwdrivers

A ratchet mechanism allows you to drive fasteners when there's little space to move the handle.

Compact Changeable-Shaft Ball-End Screwdriver Sets

The ball-end tip allows angled entry to turn screws in hard-to-reach areas. These tools are a scaled-down version of standard changeable-shaft screwdrivers, They're shorter, slimmer, and easy to take with you. Remove and replace the shaft to change the tip size.

Compact Changeable-Shaft Screwdriver Sets

A scaled-down version of standard changeable-shaft screwdrivers, these tools are shorter, slimmer, and easy to take with you. Remove and replace the shaft to use a different tip size.

Stubby Reversible-Bit Screwdriver/Nutdrivers

When working in tight spaces, these short drivers fit where others can't. Bits have a different tip at each end and snap into the shaft, which is also a nutdriver.

Reversible-Bit Screwdriver/Nutdrivers

Bits have a different tip at each end and snap into the shaft, which is also a nutdriver.

Torque Screwdrivers

Torque Screwdriver and Bit Sets

These sets include an adjustable torque driver, bits for different drive styles, and a socket adapter.

Changeable-Shaft Factory-Set Torque Screwdrivers

Choose a handle based on torque and change shafts to use a different size or drive style. Factory-set screwdrivers ensure you reach the same torque every time.

Driver Shafts

Ball-End Driver Shafts

Create your own tool by attaching these shafts to a handle, or use with socket wrenches and power tools. They have a ball end that allows angled entry to make good contact with the recess when a standard-tip shaft can’t.

Ball-End Driver Shaft Sets

These assorted shafts attach to a handle or can be used with socket wrenches and power tools. They have a ball end that allows angled entry to make good contact with the recess when a standard-tip shaft can’t.

Sockets

Hex Bit Sockets

Electrical-Insulating Hex Bit Sockets

Insulated to protect against accidental contact with live electrical circuits, these sockets are tested to 1,000 volts to meet ASTM F1505 and IEC 60900.