1/2"-20 Screws | McMaster-Carr

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Threaded on Both Ends

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Zinc Yellow-Chromate Plated

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Spring Plunger Driver

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30,000 psi to 99,999 psi

100,000 psi or greater

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Metric Class 6g

Metric Class 6H

Unified Standard Class 1A

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Unified Standard Class 3A

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EAR99

DFARS Specialty Metals

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946 Products

Fastening and Joining

Hex Head Screws

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

209 products

Socket Head Screws

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

73 products

Flat Head Screws

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

29 products

Set Screws

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

81 products

12-Point Screws

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

13 products

Rounded Head Screws

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

23 products

Shoulder Screws

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

25 products

T-Bolts

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

2 products

Threaded Rods

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

122 products

Thread Adapters

Join threads of a different type, size, and gender

223 products

Single-End Studs

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

3 products

Weld Nuts

Weld to metal surfaces to add permanent threads

23 products

Spring Plungers

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

2 products

Material Handling

Wheel Axles

Connect rotating wheels and support vehicles

3 products

Jacks

Lift, hold, push, and position heavy objects

16 products

Eyebolts

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

8 products

Power Transmission

Connecting Rods

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

79 products

Precision Lead Screws and Nuts

Pair with a motor for accurate starts and stops in automated motion and positioning applications

4 products

Fabricating and Machining

Gear and Bearing Puller Forcing Screws

Replace forcing screws on gear and bearing pullers

1 product

Grippers

Clamp against uneven or irregularly shaped parts such as castings for a secure hold

2 products

Building and Machinery Hardware

Knobs

Position, tighten, and secure fixtures and equipment

2 products

Measuring and Inspecting

Transfer Punches

Mark the center of an existing hole onto a separate workpiece

2 products