4-40 Knobs | McMaster-Carr

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Stainless Steel

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Round-Head Thumb Screw Profile

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Unthreaded Hole

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Partially Threaded

Thumb Screw Head Shape

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Collar Height

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74 Products

Fastening and Joining

Tighten and loosen by hand without the need for tools

Building and Machinery Hardware

Indicating Knobs

Indicating Knobs

Control devices and view settings at a glance

Pull Handles

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

Adjustable Handles

Adjustable Handles

Lift and turn to easily position and tighten components; also called clamping handles

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