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Graco 15K143 Knob 3/8-16 4-Prong

The Graco 15K143 Knob 3/8‑16 Prong offers ergonomic, easy grip control for machine adjustments, designed with a 3/8‑16 threaded mount and prong style handle.

  • Ergonomic prong‑style knob for Graco sprayers
  • Threaded 3/8‑16 mount for secure fit
  • OEM part that ensures consistent function and appearance

$21.8
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Graco 15K143 Knob 3/8‑16 Prong – Detailed Product Overview

Compatible Machines

  • Graco cart sprayers with control panels that specify knob part 15K143
  • Finishing machines where fine‑adjust knob is required for pressure or setting controls

The Graco 15K143 Knob 3/8‑16 Prong is designed for user‑friendly adjustment of various controls on Graco equipment. With a 3‑8‑16 thread and prong‑style grip, it allows quick hand‑turn adjustments without tools, offering both ergonomics and reliability. Its OEM build maintains original machine feel and durability.

Key Feature Benefit
3/8‑16 Thread Matches original mounting hardware for direct replacement.
Prong‑Style Grip Enables easy hand adjustment without tools.
OEM Quality Material Ensures long‑term durability and consistent feel.

Installation & Usage Tips

  • Remove the existing knob by unscrewing counter‑clockwise.
  • Clean the mounting stud and threads before installing the new knob.
  • Screw on the new knob until hand‑tight; avoid overtightening which may strip threads.
  • Check operation of the control after installation to ensure smooth movement.

Frequently Asked Questions

No — this part is specifically designed with a 3/8‑16 thread; using a different size may result in poor fit or damage.

Yes — the prong‑style grip allows manual adjustment without additional tools, improving operator convenience.

Replace only if you feel looseness, stripped threads, or if the knob becomes difficult to turn — otherwise it serves well for the life of the machine.

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