1/2"-20 Screws | McMaster-Carr

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Zinc Yellow-Chromate Plated

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30,000 psi to 99,999 psi

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EAR99

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904 Products

Fastening and Joining

Hex Head Screws

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

194 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

29 products

Rounded Head Screws

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

23 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

Shoulder Screws

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

16 products

T-Bolts

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

2 products

Thread Adapters

Join threads of a different type, size, and gender

223 products

Threaded Rods

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

122 products

Single-End Studs

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

3 products

Spring Plungers

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

2 products

Weld Nuts

Weld to metal surfaces to add permanent threads

23 products

Material Handling

Wheel Axles

Connect rotating wheels and support vehicles

3 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

Lead Screws and Nuts

Components travel along a screw with broad, square threads to clamp and lift heavy loads

4 products

Fabricating and Machining

Gear and Bearing Puller Forcing Screws

Replace forcing screws on gear and bearing pullers

1 product

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