Knurled Knobs | McMaster-Carr

A rubber coating provides a comfortable grip to position, tighten, and hold fixtures, equipment, and machinery. Mount these knobs into a threaded hole.

Easy-Clean Threaded-Stud Knobs

Suitable for food-processing areas, these one-piece knobs have no joints to collect dirt or debris. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery. Mount them into a threaded hole.

Palm-Grip Threaded-Stud Knobs

The domed top allows you to firmly hold these knobs in the palm of your hand to position, tighten, and hold fixtures, equipment, and machinery. Mount them into a threaded hole.

Left-Hand Threaded-Stud Knobs

Knobs have left-hand threads; they're used in applications where counterclockwise motion can loosen common right-hand threads. Mount them into a threaded hole to position, tighten, and hold fixtures, equipment, and machinery.

Threaded-Hole Knobs

Install these knobs on a threaded stud. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Comfort-Grip Threaded-Hole Knobs

A rubber coating provides a comfortable grip to position, tighten, and hold fixtures, equipment, and machinery. Install these knobs on a threaded stud.

Palm-Grip Threaded-Hole Knobs

The domed top allows you to firmly hold these knobs in the palm of your hand to position, tighten, and hold fixtures, equipment, and machinery. Install these knobs on a threaded stud.

Metal-Detectable Threaded-Hole Knobs

Position, tighten, and hold fixtures, equipment, and machinery near food processing lines without the risk of contaminating the food. Install these knobs on a threaded stud.

Threaded Through-Hole Knobs

Long shafts can thread through these knobs for mounting versatility. The knobs provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Unthreaded-Hole Knobs

Tap custom threads or secure with a set screw to provide a firm grip to position, tighten, and hold fixtures, equipment, and machinery.

Unthreaded-Hole Knobs with Handle

A handle makes these knobs easy to turn. Tap custom threads or secure with a set screw to provide a firm grip to position, tighten, and hold fixtures, equipment, and machinery.

Screw-Head Mount Knobs

To build a custom knob or thumb screw, pair one of these knobs with a hex or socket head screw. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Screw-Head Mount Knob Assortments

Keep a convenient selection of knobs on hand. To build a custom knob or thumb screw, pair one of these knobs with a socket head screw. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Oversized-Grip Screw-Head Mount Knobs

Convert screws into knobs so large you can grip them with heavy work gloves. Slip these knobs onto a hex or socket head screw and tighten the set screw to secure. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Screw-Head Mount Knobs with Messages

Use these knobs to display important messages. To build a custom knob or thumb screw, pair one of these knobs with a socket head screw. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Machinable-Hub Knobs

Mill specific holes or keyways in the hub to meet your specifications, or weld in place. These knobs provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Palm-Grip Machinable-Hub Knobs

The domed top allows you to firmly hold these knobs in the palm of your hand. Mill specific holes or keyways in the hub to meet your specifications, or weld in place. Use these knobs to position, tighten, and hold fixtures, equipment, and machinery.

Machinable-Hub Knobs with Handle

A handle makes these knobs easy to turn. Mill specific holes or keyways in the hub to meet your specifications, or weld in place. These knobs provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Unthreaded Through-Hole Knobs

Create custom threads or secure with a set screw to provide a firm grip to position, tighten, and hold fixtures, equipment, and machinery. Long shafts can pass through these knobs for mounting versatility.

Indicating Knobs

Control devices with round or D-shaped shafts and view settings at a glance with a pointer.

Precise-Control Knobs

Threaded-Stud Precise-Control Knobs

Mount these knobs into a threaded hole. Turn the knob to move the stud 0.005" per graduation and make precise adjustments.

Screw-Head Mount Precise-Control Knobs

To build a custom precise-control knob or thumb screw, pair one of these knobs with a socket head screw. Turn the knob to move the screw 0.005" per graduation and make precise adjustments.

Torque-Limiting Knobs

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