GBK Type 20 Service Brake Chamber with Clevis, 2.5" Long Stroke, 11.2" Fully Threaded Push Rod, 5/8"-18 Thread - Replaces Haldex SC20L, Bendix 802990, MGM 1621901, for Semi Truck Trailers

The GBK PAT-20 is a Type 20 service brake chamber that converts compressed air pressure into mechanical force to apply the brakes on Class 8 semi trucks, trailers, and heavy-duty commercial vehicles. Designed for S-Cam air brake systems, this chamber ensures consistent and powerful braking performance. Each chamber features a 2.5" stroke with a fully threaded 11.2" long push rod for maximum adjustability. Complete assembly comes with long clevis, cotter pin, and Two-hole mounting hardware for direct bolt-on installation. Specifications: Type 20; Stroke: 2.5"; Push Rod Length: 11.2"; Push Rod Thread: 5/8"-18; Mounting: Two-hole, 4.75" bolt centers; Diameter: 7"; Air Port: Round, 3/8" NPT. Built with heavy-gauge steel housing and high-quality diaphragm for long service life in demanding conditions. Meets FMCSA and DOT brake performance requirements. Fits Freightliner, Kenworth, Peterbilt, Mack, Volvo, International, and Western Star.