Frequently Asked Questions About International 9900/i/ix Frame Nut Covers

Will these frame nut covers fit my specific International 9900 model year?

Our frame nut covers are designed to fit International 9900, 9900i, and 9900ix models from 1987 through current production years. The mounting holes and frame rail specifications have remained consistent across these model years. However, we recommend measuring your existing frame nuts before ordering - standard sizes are typically 33mm or 1.5 inch hex nuts. If you have aftermarket suspension or modified frame components, please contact our technical support team to verify fitment.

What material are these frame nut covers made from, and will they rust or corrode?

We offer frame nut covers in two primary materials: chrome-plated ABS plastic and 304 stainless steel. The chrome ABS options provide excellent appearance at an economical price point and resist corrosion well, though they may show wear after 3-5 years in harsh climates. Our stainless steel covers offer superior durability and will not rust, making them ideal for trucks operating in salt-heavy regions. Both materials are UV-resistant and designed to withstand road debris impacts.

How difficult is the installation process, and what tools will I need?

Installation is straightforward and typically takes 1-2 hours for a complete set. Most covers are push-on designs that snap securely over existing frame nuts - no removal of nuts required. You'll need basic hand tools including a rubber mallet for seating the covers and possibly some degreaser to clean the frame area first. Some drivers use a small amount of silicone adhesive for extra security, though this is optional. No drilling or permanent modifications to your frame are necessary.

How many frame nut covers do I need for a complete set on my truck?

A standard International 9900 series truck typically requires between 20-30 frame nut covers for complete coverage, depending on your specific configuration. Trucks with tag axles or extended frames may need additional covers. We recommend doing a physical count of visible frame nuts on both rails before ordering. Many customers purchase our 24-piece or 30-piece bulk sets for the best value and to have spares on hand.

What styles and finishes are available, and which looks best with my truck?

We stock pointed dome, flat top, and flanged styles in chrome, polished stainless, and black powder-coated finishes. Chrome pointed dome covers are the most popular choice for a classic, high-shine appearance. Flat top designs offer a more subtle, streamlined look preferred on newer trucks. Black powder-coated options complement murdered-out builds or work trucks where chrome might be too flashy. All styles use the same mounting system, so you can mix and match if desired.