5/8"-18 Bolts | McMaster-Carr

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Threaded on Both Ends

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Finish

Zinc Yellow-Chromate Plated

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Thread Type

Metric Rounded Trapezoidal

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Tensile Strength

30,000 psi to 99,999 psi

100,000 psi or greater

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Right Hand and Left Hand

Specifications Met

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Unified Standard Class 1A

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

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Socket Head Profile

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

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REACH

DFARS Specialty Metals

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Export Control Classification Number (ECCN)

EAR99

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477 Products

Fastening and Joining

Hex Head Screws

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

133 products

Socket Head Screws

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

34 products

Flat Head Screws

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

14 products

12-Point Screws

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

2 products

Set Screws

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

33 products

Rounded Head Screws

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

3 products

Shoulder Screws

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

24 products

Thread Adapters

Join threads of a different type, size, and gender

8 products

Threaded Rods

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

77 products

Weld Nuts

Weld to metal surfaces to add permanent threads

26 products

Power Transmission

Connecting Rods

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

33 products

Rod Ends

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

55 products

Precision Lead Screw Nuts

Pair with precision lead screws for accurate starts and stops in your assembly

2 products

Die Spring Screw Caps

Brace springs and control tension in die sets while simplifying maintenance

1 product

Fabricating and Machining

Gear and Bearing Puller Forcing Screws

Replace forcing screws on gear and bearing pullers

2 products

Material Handling

Eyebolts

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

4 products

Jacks

Lift, hold, push, and position heavy objects

26 products