1/2"-13 Bolts | McMaster-Carr

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System of Measurement

Thread Size

Length

Material

Threading

Threaded on Both Ends

Finish

Corrosion-Resistant Coated

Galvanized

Hot-Dipped Galvanized

Ultra-Corrosion-Resistant Coated

Zinc Clear-Chromate Plated

Fastener Head Type

Fastener Strength Grade/Class

Head Width

Thread Spacing

Thread Direction

Thread Type

Grip Length

Specifications Met

Federal Specification

Drive Style

Spring Plunger Driver

Square

Tensile Strength

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

Screw Features

Socket Head Profile

Thread Length

DFARS Specialty Metals

Head Diameter

REACH

RoHS

Compliant with Exemptions

Not Compliant

Export Control Classification Number (ECCN)

3,898 Products

Fastening and Joining

Hex Head Screws

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

974 products

Socket Head Screws

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

260 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

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

Thumb Screws

Tighten and loosen by hand without the need for tools

49 products

Shoulder Screws

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

260 products

Square Head Screws

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

33 products

T-Bolts

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

5 products

Pentagon Head Screws

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

7 products

Tapping Screws

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

17 products

Set Screws

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

228 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

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

2 products

Hold-Down Bolts

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

5 products

Studs

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

20 products

Captive Panel Screws

Secure panels and enclosures while still having access to them

4 products

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

Single-End Studs

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

10 products

Thread Adapters

Join threads of a different type, size, and gender

212 products

Rivet Nuts

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

9 products

Weld Nuts

Weld to metal surfaces to add permanent threads

17 products

Binding Barrel Posts and Screws

Thread together for a low-profile fastener

14 products

Standoffs

Separate, position, or connect components in assemblies

1 product

Spring Plungers

Apply accurate, consistent pressure for positioning, indexing, and ejecting parts

115 products

Sockets

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

1 product

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

49 products

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

8 products

U-Bolts

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

274 products

Routing Rings

Suspend wire and cable by feeding it through the eyehole

3 products

Wheel Axles

Connect rotating wheels and support vehicles

4 products

Jacks

Lift, hold, push, and position heavy objects

25 products

Fabricating and Machining

T-Slot Bolts

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

35 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 Kits

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

4 products

Fixture Clamps

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

19 products

Clamp Holding Screws

Replace worn holding screws in clamps or customize with different sizes or styles

2 products

Clamping Screws

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

6 products

Power Transmission

Rod Ends

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

59 products

Connecting Rods

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

15 products

Building and Machinery Hardware

Bolt-Together Framing and Fittings

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

1 product

Cam Handles

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

2 products

Containers, Storage, and Furniture

Hanging Hooks

Hang tools, hoses, garments, and other supplies on walls for easy access

2 products