1/2"-13 Fasteners | McMaster-Carr

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Threaded on Both Ends

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Cadmium Yellow-Chromate Plated

Chrome Plated

Copper Plated

Corrosion-Resistant Coated

Galvanized

Hot-Dipped Galvanized

Fastener Head Type

Fastener Strength Grade/Class

Thread Direction

Thread Type

Thread Spacing

Drive Style

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Specifications Met

Federal Specification

Head Height

Tensile Strength

10,000 psi to 19,999 psi

20,000 psi to 29,999 psi

30,000 psi to 99,999 psi

100,000 psi or greater

Not Rated

Thread Fit

ASME Interference Class 5

Metric Class 6g

Metric Class 6H

Unified Standard Class 1A

Unified Standard Class 1B

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

Thread Length

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DFARS Specialty Metals

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RoHS

Compliant with Exemptions

Head Diameter

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

Yes

Export Control Classification Number (ECCN)

4,696 Products

Fastening and Joining

Hex Head Screws

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

989 products

Socket Head Screws

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

261 products

Flat Head Screws

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

148 products

Rounded Head Screws

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

89 products

Pentagon Head Screws

Create a tamper-resistant joint with a head than can only be removed with a 5-point socket

9 products

Carriage Bolts

A smooth head provides a finished look while a square neck keeps the bolt in place when using a nut

132 products

12-Point Screws

12 contact points handle more torque than a hex head while a flange eliminates the need for a washer

12 products

Set Screws

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

228 products

Square Head Screws

Turn the large flat sides with a wrench into square holes that stop further rotation

33 products

Tapping Screws

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

17 products

Shoulder Screws

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

269 products

Plow Bolts

The head sits flush with countersunk holes while the bolt stays in place when tightening a nut

6 products

Elevator Bolts

Create a flush joint to allow movement in tight spaces such as grain elevators and belting systems

8 products

T-Bolts

Turn by hand for easy fastening, use as a handle, or attach as a point for straps and clamps

5 products

Hold-Down Bolts

Hold material under the bent head while the other end is tightened down with a nut

5 products

Thumb Screws

Tighten and loosen by hand without the need for tools

52 products

Studs

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

11 products

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

2 products

Captive Panel Screws

Secure panels and enclosures while still having access to them

4 products

Hex Nuts

Handle most general fastening needs

117 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

67 products

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

5 products

Flange Nuts

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

37 products

Coupling Nuts

Connect and extend threaded rods

29 products

Cap Nuts

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

27 products

Push-Button Nuts

Disengage the threads to quickly slide along threaded rods

3 products

Square Nuts

Flat sides won’t spin in channels and square holes

10 products

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

19 products

Split Nuts

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

2 products

Sealing Nuts

Prevent leaks and block out contaminants with a rubber seal

1 product

Socket Nuts

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

2 products

Threaded Inserts

Create new threads or repair stripped threads

181 products

Screw-Mount Nuts

Mount with screws, rivets, and nails to add threads to a surface

2 products

Press-Fit Nuts

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

4 products

Weld Nuts

Weld to metal surfaces to add permanent threads

17 products

Rivet Nuts

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

9 products

Snap-In Nuts

Push into square holes in thin materials to add bolts for aligning off-center parts

1 product

Push Nuts

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

1 product

Threaded Rods

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

400 products

Anchors

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

129 products

Quick-Release Pin Receptacles

Secure quick-release pins when you don’t have a through hole

1 product

Quick-Release Pins

Fasten or remove components on equipment with a spring-loaded retaining ball

3 products

Taper Pins

Fit snugly into tapered holes to secure, position, and align components

2 products

Binding Barrel Posts and Screws

Thread together for a low-profile fastener

14 products

Thread Adapters

Join threads of a different type, size, and gender

301 products

Standoffs

Separate, position, or connect components in assemblies

35 products

Single-End Studs

Use the unthreaded end as a pivot point, hinge, shaft, or locator pin

10 products

Threaded Insert Installation Tools

Install helical, key-locking, slotted-drive, and other threaded inserts

Anchor Installation Tools

Drive with a hammer to expand and secure anchors in place

3 products

Material Handling

Eyebolts

Route rope through the loop or attach hooks and shackles for lifting

101 products

Hoist Rings

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

48 products

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

8 products

Turnbuckles

Twist the body or end fittings to adjust the length and tension of attached rope and chain

92 products

Hooks

Lift, hang, and bind loads with rope and chain

4 products

U-Bolts

Anchor heavy pipe, tube, and conduit; stronger than routing clamps and hangers

274 products

U-Bolt Plates

Reinforce mounted U-bolts for a more secure hold

35 products

Routing Rings

Suspend wire and cable by feeding it through the eyehole

3 products

Building and Machinery Hardware

Knobs

Position, tighten, and secure fixtures and equipment

36 products

Machine Handles

Arms give you extra leverage to secure and position jigs, fixtures, and other equipment

4 products

Handle Nuts

Attach to threaded shafts to quickly turn the shafts by hand

5 products

Cam Handles

For fast clamping, push down on the handle to draw two parts together

2 products

Leveling Mount Inserts

Slip onto equipment and furniture to add threaded-stud leveling feet

21 products

Bolt-Together Framing and Fittings

Fasten through equally spaced holes to build and adjust guards, tables, and racks

1 product

Strut Channel Nuts

Fasten on threaded rod to connect components to strut channel

30 products

Fabricating and Machining

T-Slot Bolts

Secure clamps and workpieces to machine tables with quicker setup than a T-slot nut and stud

38 products

T-Slot Nuts

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

38 products

Setup Studs

Secure setup clamps and fixtures to your machine table or assemble heavy machines

64 products

Fixture Clamps

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

24 products

Fixture Kits

Everything needed to mount workpieces of different sizes to your machine table

7 products

Drill Bushings

Fit in holes to guide drill bits and other cutting tools for precise and repeatable holes and cuts

9 products

Lathe Chuck Jaw Nuts

Secure jaws to a CNC lathe chuck

1 product

C-Clamps

Temporarily secure workpieces together or to a work surface

3 products

Toggle Clamps

Lock workpieces onto worktables or objects

9 products

Clamping Screw Mounting Bases

Thread clamping screw clamps into the holes to hold workpieces

2 products

Clamping Screw Clamps

Mount in a base or through a threaded hole, then tighten the tip to hold a workpiece in place

4 products

Power Transmission

Rod Ends

Use with connecting rods to support loads and control steering, tensioning, or pivoting motion

54 products

Connecting Rods

Use with rod ends and swivel joints to link components in push/pull assemblies

15 products