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CAT # KNB-231 (1 Review) Write a Review

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Product Description
Apem # MKCB-500B-1/8-7. Black, machined aluminum control knob for 1/8" diameter shaft. Base is 0.5" diameter x 0.32" high. Top portion of knob is rectangular, 0.49" x 0.22" x 0.44" high. A black pointer groove is etched into one side of knob. Two set screws.
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
(This item was manufactured prior to August 31st, 2018)

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Customer Reviews (1 Review)

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Quality Knob

Reviewer: from Bay Area, CA USA

Sourced some 1/8" diameter shaft Allen Bradley pots (ATP-503) on this site and needed a pair of small knobs with a quality look and feel.

These are perfect. They are well made with a flawless glossy black finish. Two set screws fix them securely to the shaft.

The set screws are not metric. They need an SAE size 0.050" hex key, which is commonly found in SAE small hex key assortment kits.

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