Hex Heads | McMaster-Carr

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System of Measurement

Thread Size

Length

Material

Fastener Head Type

Threading

Threaded on Both Ends

Finish

Corrosion-Resistant Coated

Diamond Coated

Dyed

Galvanic Barrier Coated

Galvanized

Hot-Dipped Galvanized

Magnesium Phosphate Coated

Manganese Phosphate Coated

Fastener Strength Grade/Class

Head Width

Thread Pitch

Head Height

Thread Spacing

Screw Features

Thread Type

UN/UNF (SAE Straight)

Drive Size

Specifications Met

Federal Specification

Thread Direction

Screw Size

Tensile Strength

Less than 100,000 psi

100,000 psi to 119,999 psi

120,000 psi to 129,999 psi

130,000 psi to 149,999 psi

150,000 psi or greater

Thread Fit

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

DFARS Specialty Metals

RoHS

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

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

Yes

Export Control Classification Number (ECCN)

22,726 Products

Fastening and Joining

Hex Head Screws

Used with nuts to create a stronger joint than flat and rounded screws

11,773 products

Tapping Screws

Fasten a range of materials together without needing to tap the hole first

1,090 products

Fastener Assortments

Keep a variety of common screws, nuts, and washers on hand

4 products

Wood Screws

Fasten material to wood or pieces of wood to each other

452 products

Rounded Head Screws

Sit just above the surface for a low-profile finish and hold tighter than flat head screws

2,742 products

Shoulder Screws

Rotate parts around the cylinder under the head to guide and align them during installation

92 products

Concrete Screws

Anchor parts to concrete, block, and brick without tapping the hole first

84 products

Thumb Screws

Tighten and loosen by hand without the need for tools

22 products

Set Screws

Exert pressure at the tip to hold parts in place, unlike screws that hold material together with threads

35 products

Screwdriver Bits

Pair with drivers to turn screws

983 products

Nutdriver Bits

Pair with nutdrivers to turn hex nuts and cap screws

93 products

Screwdrivers

Tighten and loosen screws

230 products

Impact Drivers

More powerful than drills to drive screws through dense material and loosen stuck fasteners

1 product

Bit Adapters

Connect a variety of bits to drills, powered screwdrivers, ratchet wrenches, and other turning tools

63 products

T-Handle Keys

To turn fasteners in hard-to-reach spots, there's a long shaft and a grip for your whole hand

422 products

Threaded Rod and Stud Driver Bits

Quickly install threaded rods and studs with a cordless drill, instead of by hand

2 products

Torque Screwdrivers

Apply precise torque as you fasten screws to prevent overtightening

17 products

One-Way Screw Remover Bits

Use with a nutdriver to loosen one-way screws

7 products

Screwdriver/Nutdrivers

Quickly switch between driving screws and driving nuts

5 products

Eyebolt and Hook Driver Bits

Install and remove eyebolts and screw-in hooks

4 products

Wing Nut Driver Bits

Use with power tools to hold and turn wing nuts

1 product

Wood Screw Threaded Stud Driver Bits

Install wood screw threaded studs, which are also known as dowel screws

3 products

Hanger Bolt Driver Bits

Turn flat-end bolts and screws

4 products

L-Key Handles

Comfort with every turn—these upgrade your L-keys into T-handle keys

1 product

Bit Sockets

Turn fasteners with an internal drive style without slipping and damaging the drive

780 products

Sockets

Turn fasteners with an external drive style without slipping and damaging the drive

1,798 products

Box Wrenches

Grip all sides of a fastener to prevent slipping

332 products

Open-End Wrenches

Tighten and loosen fasteners from the top or the side

569 products

Ratchet Wrenches

Adjust fasteners in tight spaces without removing and repositioning the wrench

1 product

Socket Bits

Switch out worn or damaged bits instead of replacing your entire bit socket

37 products

Water Meter Wrenches

Turn meter couplings and shut-off valve nuts on water meters

1 product

Wrench Heads

Attach to your ratchet wrench and socket extension to turn fasteners where clearance is limited

135 products

Backup Wrenches

Pair with a head and handle to create a wrench that keeps nuts from turning as you tighten bolts

15 products

Fluid Handling

Pipe Plugs

Insert into the ends of pipe to keep out dirt and debris

461 products

Pipe Bushings

Connect two pipes of different diameters

29 products

Pipe

Join with fittings and additional lengths of pipe

76 products

Pipe Tees

Split or merge liquid flow paths

31 products

Pipe Elbows

Change the direction of flow when joining lengths of pipe

40 products

Pipe Straights

Join lengths of pipe to send contents in one direction

81 products

Electrical Power, Networking, and Controlling

Electrical Enclosure Fasteners

Mount components to your enclosure without worrying about leaks

3 products

Building and Machinery Hardware

Clamp-On Framing and Fittings

Two-piece fittings let you modify assembly stations, conveyors, and racks without dismantling them

1 product

Protective Caps

Protect just about anything, including pipe, flanges, screws, and posts

17 products

Fabricating and Machining

Drill/Screwdriver Bits

Quickly change between drilling countersunk holes and driving screws

6 products

Containers, Storage, and Furniture

Hex Key Organizers

Store L-keys and T-handle keys according to size

14 products

Bit Organizers

Store and organize several sizes and styles of bits

6 products