1/2"-20 Bolts | McMaster-Carr

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12-Point Screws

Connecting Rods

Die Spring Screw Caps

Eyebolts

Flat Head Screws

Gear and Bearing Puller Forcing Screws

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Jacks

Precision Lead Screws and Nuts

System of Measurement

Thread Size

Length

Threading

Threaded on Both Ends

Fastener Head Type

Fastener Strength Grade/Class

Material

Finish

Zinc Yellow-Chromate Plated

Thread Spacing

Head Width

Thread Direction

Right Hand and Left Hand

Thread Type

Head Height

Grip Length

Drive Style

Spring Plunger Driver

Tensile Strength

Less than 10,000 psi

30,000 psi to 99,999 psi

100,000 psi or greater

Not Rated

Thread Fit

Metric Class 6g

Metric Class 6H

Unified Standard Class 1A

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Specifications Met

Thread Length

Socket Head Profile

Tip Type

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

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

REACH

RoHS

Compliant with Exemptions

Not Compliant

Export Control Classification Number (ECCN)

EAR99

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966 Products

Fastening and Joining

Hex Head Screws

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

219 products

Socket Head Screws

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

74 products

Flat Head Screws

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

29 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

Set Screws

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

81 products

T-Bolts

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

2 products

Shoulder Screws

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

25 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

Thread Adapters

Join threads of a different type, size, and gender

156 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

Power Transmission

Connecting Rods

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

79 products

Rod Ends

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

82 products

Die Spring Screw Caps

Brace springs and control tension in die sets while simplifying maintenance

1 product

Precision Lead Screws and Nuts

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

4 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

Jacks

Lift, hold, push, and position heavy objects

16 products

Fabricating and Machining

Gear and Bearing Puller Forcing Screws

Replace forcing screws on gear and bearing pullers

1 product