Description

When your old switch knob starts slipping, cracking, or won’t stay put, you know how frustrating it can be trying to operate your headlight or electrical switches properly. This replacement knob gets you back to reliable control with its secure set screw design and precision 3/16″ stem hole. Whether you’re adjusting lights in the field or operating electrical controls during long days, you need switches that respond when you need them.

What You’re Getting

Precision-machined 3/16″ stem hole for exact fit on compatible switches
Set screw design provides secure attachment that won’t slip or work loose
Quality TISCO construction built to handle daily use and weather exposure
Works with headlight switches including part 251405 for proper electrical control
Direct replacement that installs quickly without modifications

Built for Daily Operation

This knob is designed for tractors and equipment where reliable switch operation matters. If you’re running headlights for early morning or late evening work, or operating other electrical controls throughout the day, this knob gives you the positive feel and secure grip you need. The set screw ensures it stays exactly where you put it, even with gloves on or in wet conditions.

Made to Last

TISCO builds this knob from durable materials that resist cracking, fading, and wear from constant use. The set screw design means you can tighten it properly for a secure fit that won’t loosen up over time like some push-on styles do. It’s built to handle the vibration and temperature changes that come with farm equipment use.

Installation Notes

Simply slide the knob onto your switch stem until it’s positioned where you want it, then tighten the set screw securely. Make sure the stem is clean and free of corrosion for the best fit. If you’re replacing an old knob, check that the switch stem isn’t worn or damaged – a good knob needs a good stem to work properly.