WA248433 is a PP-1 style yellow dash valve knob with integrated pin; engineered for heavy-duty truck air brake control panels; offers a secure, tactile grip and direct fitment on 3/8" valve stems. Stem size: 3/8 inch; Color: Bright Yellow for quick visual identification; ideal for service brake valve replacements; durable ABS construction resists cracking, fading, and wear. Part Type: Air Brake Valve Knob & Pin Assembly; Taxonomy A: Brake Components, B: Air Brake Valves, C: Repair Kits & Parts, D: Knobs; compatible with common dash valve applications. High-visibility molded knob ensures operator awareness and system safety; designed to meet OEM specifications for fit and function in vocational, fleet, and long-haul vehicles. Replaces OEM and aftermarket parts from Bendix, Haldex, Automann, Volvo, Freightliner, Mack, Navistar, and others—ideal for fast maintenance, fleet upgrades, or dash panel overhauls.