5/8"-18 Nuts | McMaster-Carr

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System of Measurement

Thread Size

Material

Stainless Steel

Nut Type

Tamper Resistant

Hex Nut Profile

Fastener Strength Grade/Class

Finish

Aluminum Plated

Cadmium Yellow-Chromate Plated

Phosphate Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Thread Direction

Width

Height

Thread Spacing

Thread Type

UN/UNF (SAE 45°)

Locking Type

Distorted Thread

Two-Piece Clamp

Fastener Strength Rating

Specifications Met

Fed. Spec. FF-N-836

Performance

Corrosion Resistant

Vibration Resistant

Length

Drive Style

External 12-Point

Flange Diameter

Thread Fit

Unified Standard Class 2B

Unified Standard Class 3B

DFARS Specialty Metals

Export Control Classification Number (ECCN)

RoHS

Compliant with Exemptions

REACH

Color

Threading

Partially Threaded

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Fastening and Joining

Hex Nuts

Handle most general fastening needs

Locknuts

Hold fasteners in place to prevent loosening from vibration

Flange Nuts

The flange distributes pressure, so you don't need a washer

Coupling Nuts

Connect and extend threaded rods

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

Socket Nuts

Install in recessed holes and tight spots where a wrench won’t fit; also known as Allen nuts

Sealing Nuts

Prevent leaks and block out contaminants with a rubber seal

Easy to tighten and loosen by hand for making frequent adjustments

Tamper-Resistant Nuts

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Weld Nuts

Weld to metal surfaces to add permanent threads

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

Fluid Handling

Tube Fitting Nuts

Tube Fitting Nuts

Tighten to create a strong seal between tube and tube fittings

Hose and Hose Fittings

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

Building and Machinery Hardware

Handle Nuts

Attach to threaded shafts to quickly turn the shafts by hand

Material Handling

Turnbuckles

Twist the body or end fittings to adjust the length and tension of attached rope and chain

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