Serrated Locknuts | McMaster-Carr

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Phosphor Bronze

Stainless Steel

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Tamper Resistant

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Black Zinc Plated

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Zinc Flake Coated

Zinc Yellow-Chromate Plated

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Stainless Steel

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Corrosion Resistant

Vibration Resistant

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Lock Washer Type

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1,843 Products

Fastening and Joining

Locknuts

Hold fasteners in place to prevent loosening from vibration

Flange Nuts

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

Tamper-Resistant Nuts

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

Lock Washers

Resist vibration to prevent fasteners from loosening

Rounded Head Screws

Rounded Head Screws

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

Hex Head Screws

Hex Head Screws

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

Power Transmission

Bearing Lock Washers

Bearing Lock Washers

Lock bearing nuts in place to prevent loosening due to vibration

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