Frequently Asked Questions About Kenworth Cabover Dash Nuts & Screws

What thread sizes and specifications do I need for my Kenworth cabover dash?

Most Kenworth cabover models from the 1960s through 1990s use a combination of 1/4"-20, 5/16"-18, and 3/8"-16 thread sizes for dash components. The most common are 1/4"-20 for gauge mounting and smaller trim pieces, while 5/16"-18 is typical for heavier dash panels and radio brackets. Always verify your specific model year as some K100, K100E, and W900A models may have variations. We recommend purchasing a variety pack if you're doing a complete dash restoration.

Are stainless steel or chrome-plated fasteners better for dash applications?

Stainless steel fasteners are the preferred choice for dash applications due to their superior corrosion resistance and durability. While chrome-plated fasteners offer an attractive finish initially, the plating can chip or flake over time, especially in high-vibration environments. Grade 304 stainless steel provides excellent longevity and maintains its appearance without special care. For visible applications where aesthetics matter most, polished stainless steel offers the best combination of looks and performance.

How do I prevent cracking vintage dash panels when installing new hardware?

Pre-drilling pilot holes is essential when working with older fiberglass or ABS dash panels. Use a drill bit that's slightly smaller than your screw's core diameter, and always support the back of the panel while drilling. Apply steady, gentle pressure when tightening fasteners and stop when you feel resistance. Using rubber or nylon washers between the fastener head and dash surface helps distribute pressure and prevents stress cracks. For brittle panels, consider using thread-locking compound instead of over-tightening.

What's included in a typical dash hardware kit, and will it cover my entire restoration?

A comprehensive dash hardware kit typically includes 20-30 pieces consisting of various length machine screws, sheet metal screws, flat washers, lock washers, and specialty clips. However, most kits cover about 70-80% of a complete dash restoration. You'll likely need additional hardware for aftermarket accessories, custom gauge panels, or if previous owners made modifications. We recommend ordering 20-30% extra fasteners beyond the basic kit, especially for hard-to-find thread pitches.

Can I use standard hardware store fasteners, or do I need OEM-specific parts?

While standard hardware store fasteners can work for hidden applications, OEM-style fasteners are recommended for proper fit and appearance. Kenworth used specific head styles, shoulder lengths, and thread pitches that standard fasteners may not match. This is particularly important for gauge bezels, switch panels, and visible trim pieces where incorrect hardware can cause poor fitment or damage. OEM-style fasteners also typically feature the correct finish and head markings for authentic restorations.