Hex | McMaster-Carr

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System of Measurement

Thread Size

Length

Material

Fastener Head Type

Threading

Threaded on Both Ends

Finish

Cadmium Yellow-Chromate Plated

Chrome Plated

Corrosion-Resistant Coated

Dyed

Galvanic Barrier Coated

Galvanized

Hot-Dipped Galvanized

Magnesium Phosphate Coated

Manganese Phosphate Coated

Fastener Strength Grade/Class

Drive Style

Hex with Pilot Recess

Tamper-Resistant Torx

Thread Pitch

Head Width

Thread Spacing

Thread Type

Thread Direction

Specifications Met

Head Height

Thread Fit

Metric Trapezoidal Class 7H

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

Socket Head Profile

Drive Size

Tensile Strength

2,170 psi to 2,800 psi

4,500 psi

7,100 psi

9,195 psi to 11,030 psi

11,000 psi

11,200 psi to 12,300 psi

DFARS Specialty Metals

RoHS

Compliant with Exemptions

Width

REACH

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

Yes

Export Control Classification Number (ECCN)

57,825 Products

Fastening and Joining

Hex Head Screws

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

11,770 products

Socket Head Screws

With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold

7,915 products

Rounded Head Screws

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

2,742 products

Flat Head Screws

Fit in countersunk holes for a flush finish that won't snag on surrounding parts

2,576 products

Tapping Screws

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

1,097 products

Set Screws

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

4,813 products

Shoulder Screws

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

6,534 products

Captive Panel Screws

Secure panels and enclosures while still having access to them

130 products

Wood Screws

Fasten material to wood or pieces of wood to each other

452 products

Studs

Press, weld, or screw in place to add a threaded fastening point

1 product

Fastener Assortments

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

4 products

Thumb Screws

Tighten and loosen by hand without the need for tools

78 products

Jack Screws

Create vibration-resistant connections between D-sub cords and panels

22 products

Joint Clamps for Wood

Make secure joints between boards, butcher blocks, and countertops

2 products

Masonry and Concrete Screws

Anchor parts to masonry and concrete without tapping the hole first

73 products

Hex Nuts

Handle most general fastening needs

3,199 products

Coupling Nuts

Connect and extend threaded rods

492 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

1,602 products

Socket Nuts

Install in recessed holes and tight spots where a wrench won’t fit; also known as Allen nuts

65 products

Flange Nuts

The flange distributes pressure, so you don't need a washer

700 products

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

421 products

Sealing Nuts

Prevent leaks and block out contaminants with a rubber seal

27 products

Panel Nuts

Extremely thin for tight spots such as electrical panels; also known as dress nuts

114 products

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

24 products

Push-Button Nuts

Disengage the threads to quickly slide along threaded rods

10 products

Split Nuts

Swivel to attach at any point on a threaded rod for quick installation

18 products

Lug Nuts

Secure pneumatic wheels to axles

8 products

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

6 products

Standoffs

Separate, position, or connect components in assemblies

4,177 products

Thread Adapters

Join threads of a different type, size, and gender

3,548 products

Rivet Nuts

Add threads to thin panels with access from only one side; also known as blind inserts

63 products

Press-Fit Nuts

Push into drilled or punched holes to add threads to thin panels

76 products

Weld Nuts

Weld to metal surfaces to add permanent threads

73 products

Threaded Inserts

Create new threads or repair stripped threads

69 products

Clip-On Nuts

Slide onto the edge of thin panels to create a fastening point

18 products

Push Nuts

Press onto threads for a light duty hold that’s faster to install than typical nuts

25 products

Anchors

Secure anything from signs to heavy machinery in concrete, brick, and drywall

56 products

Binding Barrels

Create custom low-profile fasteners with binding barrel posts, caps, and screws

193 products

Threaded Rods

Anchor, connect, or hang components in a wide variety of applications

55 products

Rivets

Join materials together permanently, especially when too thin or fragile to fasten with screws

6 products

Bit Sockets

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

766 products

Sockets

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

1,820 products

Socket Bits

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

37 products

Open-End Wrenches

Tighten and loosen fasteners from the top or the side

569 products

Water Meter Wrenches

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

1 product

Box Wrenches

Grip all sides of a fastener to prevent slipping

331 products

Wrench Heads

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

135 products

Ratchet Wrenches

Adjust fasteners in tight spaces without removing and repositioning the wrench

1 product

Backup Wrenches

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

15 products

Raw Materials

Steel

Strong, machinable, and weldable—all with material certificates for traceability

106 products

Aluminum

Lightweight, easy to machine, and corrosion resistant—all with material certificates for traceability

69 products

Stainless Steel

Resists corrosion and chemicals in most environments—all with material certificates for traceability

145 products

Brass

More machinable than copper and bronze—all with material certificates for traceability

40 products

Plastic

A lightweight alternative to metal and glass

10 products

Copper

Our most conductive metal for electrical applications—all with material certificates for traceability

6 products

Carbon Fiber

The strongest composite we offer; comparable in strength to 6061 aluminum but lighter in weight

12 products

Power Transmission

Lead Screws and Nuts

Move components in a straight line in clamping and heavy duty lifting and lowering applications

179 products

Fabricating and Machining

T-Slot Nuts

Combine with setup studs or bolts to mount fixtures to machine tables

14 products

Fixture Clamps

Secure your workpiece to a fixture table so it won't move during machining

194 products

Clamping Screws

Apply pressure through a flat-tipped screw to hold material in place

11 products

C-Clamps

Temporarily secure workpieces together or to a work surface

3 products

Lathe Tool Insert Holder Replacement Parts

Replace clamps, screws, shims, and other parts in lathe tool insert holders

26 products

Electrical Power, Networking, and Controlling

Electrical Enclosure Fasteners

Mount components to your enclosure without worrying about leaks

3 products

Material Handling

Turnbuckle Nuts

Tighten against a turnbuckle body to prevent the end fitting from unscrewing

34 products

Hoist Rings

Pivot to resist stress that would bend or break an eyebolt when lifting at an angle

34 products

Building and Machinery Hardware

Slip-On Framing Fasteners

Replace set screws used on slip-on framing

2 products

Containers, Storage, and Furniture

Locker Fasteners

Keep lockers aligned and stable by connecting them to each other

1 product