THTEN KTHA 1040-03 plastic bump knob closeup for quick replacement
THTEN KTHA 1040-03 bump knob mounted on a Kobalt 80V trimmer
THTEN KTHA 1040-03 compatibility guide with Kobalt 40V for flexible use
THTEN KTHA 1040-03 shown with Kobalt 40V KST 1040A-03 and others
THTEN KTHA 1040-03 model numbers 2908503 and 1315053 listed
THTEN KTHA 1040-03 0.080-inch plastic line trimmer replacement head detail
THTEN KTHA 1040-03 vivid plastic construction for durable replacements
THTEN KTHA 1040-03 packaged bump knob ready for installation

THTEN

THTEN KTHA 1040-03 Plastic Bump Knob — Compatible with Kobalt 80V & 40V Trimmers

High-performance patio lawn and garden made for confident daily results

$29.02

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Why customers choose Cera Garden

Premium bump knob replacement for Kobalt trimmers

When a bump knob wears out or breaks, it can make trimming less efficient and more frustrating. The THTEN KTHA 1040-03 plastic bump knob is designed to be a direct, no-fuss replacement for select Kobalt trimmers. Built from durable plastic and sized for a confident grip, it aims to restore the tactile feel and control you rely on during yard work.

What it fits

The knob is listed as compatible with a range of Kobalt trimmers, including 80V models (623432 and 620250) and 40V trimmers (KST 1040A-03, KST 1040B-03). It also covers several 24V models (KST 224A-03, KST 224B-03, KST 2540-06, KST-1341, KST 2580-06).

  • 80V compatibility for demanding jobs
  • 40V and 24V models covered for broad use
  • Model number 2908503 and item numbers 1315053, 4665020, 2127552 referenced for easy sourcing

Material and build

Crafted from resilient plastic, the 0.080-inch line head rating indicates a compact, sturdy build designed for steady bump functionality and long-term reliability. The design emphasizes a clean profile that resists snagging during operation.

  • Durable plastic construction with a smooth surface finish
  • Simple, tool-free replacement process possible with standard gear
  • Compact size that blends with the trimmer body for a seamless feel

Practical use cases

In daily yard tasks, a dependable bump knob helps you advance the line and adjust feed without halting workflow. The part is designed to work with a variety of Kobalt trimmers, enabling quick swaps when other parts wear.

  • Fast replacement after wear for uninterrupted mowing of edges and lawns
  • Reliable grip during edging along sidewalks and fence lines
  • Adaptable use across different Kobalt voltage platforms for light-to-moderate trimming

Why choose a THTEN replacement

Opting for a THTEN component can provide a compatible, quality entry in your spare-part kit. While results can vary with each tool, buyers may notice easier adjustments and a more consistent bump action when installed correctly.

FAQ

Q: Which Kobalt models are compatible with the THTEN KTHA 1040-03 bump knob?

A: Compatible with select Kobalt 80V and 40V models listed, including 623432, 620250, KST 1040A-03, 1040B-03, 224A-03, 224B-03, 2540-06, 2580-06, and 1341.

Q: What is the material and intended use of this knob?

A: Durable plastic construction for quick replacement, restoring grip and easy adjustments during trimming.

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