1/2"-20 Bolts | McMaster-Carr

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System of Measurement

Thread Size

Length

Threading

Partially Threaded

Threaded on Both Ends

Threaded on One End

Fastener Head Type

Material

Stainless Steel

Fastener Strength Grade/Class

Finish

Phosphate Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Thread Spacing

Head Width

Thread Type

Thread Direction

Right Hand and Left Hand

Tensile Strength

Less than 10,000 psi

30,000 psi to 99,999 psi

100,000 psi or greater

Head Height

Drive Style

External 12-Point

Spring Plunger Driver

Grip Length

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

Fed. Spec. FF-S-85

Screw Features

Socket Head Profile

Head Diameter

DFARS Specialty Metals

REACH

Export Control Classification Number (ECCN)

RoHS

Compliant with Exemptions

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966 Products

Fastening and Joining

Hex Head Screws

Hex Head Screws

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

Socket Head Screws

Socket Head Screws

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

12-Point Screws

12-Point Screws

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

Flat Head Screws

Flat Head Screws

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

Rounded Head Screws

Rounded Head Screws

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

Set Screws

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

T-Bolts

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

Shoulder Screws

Shoulder Screws

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

Threaded Rods

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

Single-End Studs

Single-End Studs

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

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Weld Nuts

Weld to metal surfaces to add permanent threads

Spring Plungers

Spring Plungers

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

Power Transmission

Connecting Rods

Connecting Rods

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

Rod Ends

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

Precision Lead Screws and Nuts

Precision Lead Screws and Nuts

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

Die Spring Screw Caps

Die Spring Screw Caps

Brace springs and control tension in die sets while simplifying maintenance

Material Handling

Wheel Axles

Connect rotating wheels and support vehicles

Eyebolts

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

Jacks

Lift, hold, push, and position heavy objects

Fabricating and Machining

Gear and Bearing Puller Forcing Screws

Gear and Bearing Puller Forcing Screws

Replace forcing screws on gear and bearing pullers

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)