Thumb Screw Knobs | McMaster-Carr

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Threaded Through Hole

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Stainless Steel

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Thumb Screw Head Shape

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Partially Threaded

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Stainless Steel

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Stainless Steel

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2,863 Products

Knobs

Threaded-Hole Knobs

Threaded-Hole Knobs

Install on a threaded stud to provide a secure grip

Screw-Head Mount Knobs

Screw-Head Mount Knobs

To build a custom knob or thumb screw, pair with a hex or socket head screw

Threaded Through-Hole Knobs

Threaded Through-Hole Knobs

Long shafts can thread through these knobs for mounting versatility

Threaded-Stud Knobs

Threaded-Stud Knobs

Mount these knobs into a threaded hole

Screw-Head Mount Knob Assortments

Screw-Head Mount Knob Assortments

Keep a convenient selection of knobs on hand

Choose-a-Color Threaded-Hole Knobs

Choose-a-Color Threaded-Hole Knobs

Identify equipment controls and components at a glance by their color

Unthreaded-Hole Knobs

Unthreaded-Hole Knobs

Tap custom threads or secure with a set screw

Comfort-Grip Threaded-Hole Knobs

Comfort-Grip Threaded-Hole Knobs

A rubber coating provides a comfortable grip

Choose-a-Color Threaded-Stud Knobs

Choose-a-Color Threaded-Stud Knobs

Identify equipment controls and components at a glance by their color

Choose-a-Color Threaded Through-Hole Knobs

Choose-a-Color Threaded Through-Hole Knobs

Identify equipment controls and components at a glance by their color

Unthreaded Through-Hole Knobs

Unthreaded Through-Hole Knobs

Create custom threads

Comfort-Grip Threaded-Stud Knobs

Comfort-Grip Threaded-Stud Knobs

A rubber coating provides a comfortable grip

Easy-Clean Threaded-Stud Knobs

Easy-Clean Threaded-Stud Knobs

One-piece with no joints to collect dirt or debris

Palm-Grip Threaded-Hole Knobs

Palm-Grip Threaded-Hole Knobs

The domed top allows you to firmly hold these knobs in your palm

Vibration-Resistant Threaded Through-Hole Knobs

Vibration-Resistant Threaded Through-Hole Knobs

A nylon insert grips threads to resist loosening

Vibration-Resistant Threaded-Stud Knobs

Vibration-Resistant Threaded-Stud Knobs

An acrylic adhesive adds friction to resist loosening from vibration

Comfort-Grip Threaded Through-Hole Knobs

Comfort-Grip Threaded Through-Hole Knobs

A rubber coating provides a comfortable grip

Oversized-Grip Screw-Head Mount Knobs

Oversized-Grip Screw-Head Mount Knobs

Convert screws into knobs so large you can grip them with heavy work gloves

Tethered Threaded-Stud Knobs

Tethered Threaded-Stud Knobs

Never lose these knobs—tether them to equipment

Sanitary Threaded-Hole Knobs

Sanitary Threaded-Hole Knobs

Designed for sanitary environments

Tethered Threaded-Hole Knobs

Tethered Threaded-Hole Knobs

Never lose these knobs—tether them to equipment

Palm-Grip Threaded-Stud Knobs

Palm-Grip Threaded-Stud Knobs

The domed top allows you to firmly hold these knobs in your palm

Torque-Limiting Knobs

Torque-Limiting Knobs

Set torque with a hex key to prevent overtightening that can damage equipment

Metal-Detectable Threaded-Hole Knobs

Metal-Detectable Threaded-Hole Knobs

Detect if a piece breaks off into your food processing line

Quick-Lock Threaded Through-Hole Knobs

Quick-Lock Threaded Through-Hole Knobs

Quick to install, position, and remove

Threaded Through-Hole Bar Knobs

Threaded Through-Hole Bar Knobs

Add a bar for maximum leverage when tightening on a threaded stud

Unthreaded-Hole Knobs with Handle

Unthreaded-Hole Knobs with Handle

A handle makes these easy to turn

Left-Hand Threaded-Stud Knobs

Left-Hand Threaded-Stud Knobs

Less likely to loosen from counterclockwise motion than right-hand threads

Metal-Detectable Threaded-Stud Knobs

Metal-Detectable Threaded-Stud Knobs

Detect if a piece breaks off into your food processing line

Screw-Head Mount Knobs with Messages

Screw-Head Mount Knobs with Messages

Use these knobs to display important messages

Other Products

Tighten and loosen by hand without the need for tools

Pull Knobs

Use a knob to open and close cabinets, drawers, and doors

Indicating Knobs

Indicating Knobs

Control devices and view settings at a glance

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