Dongfeng KR truck parts Left connecting bracket 8406161-C5100

Built to withstand static and dynamic loads of connecting critical Dongfeng KR components (e.g., securing the left front bumper to the chassis or attaching a side step to the frame), the bracket uses premium Q345B low-alloy structural steel with a minimum yield strength of 345 MPa. The material undergoes precision stamping and robotic welding to form a rigid, L-shaped structure, with 7mm-thick reinforced sections at key stress points (e.g., mounting hole peripheries and frame contact edges) that distribute load evenly. Finite Element Analysis (FEA) testing confirms it can handle a static load of 6,500N (well above the KR’s typical left-side component connection load of 4,800N) without permanent deformation, and endure 110,000+ cycles of dynamic vibration (simulating road conditions) without fatigue cracking. Unlike low-carbon steel brackets that bend under stress, this high-strength design ensures stable component connection throughout the truck’s service life

Engineered to serve as a flexible link between multiple left-side components of the Dongfeng KR, the bracket features a multi-hole and multi-surface layout. It includes two sets of standardized mounting holes: one set compatible with the KR’s left chassis frame (M12 bolts) for secure attachment, and another set (M10 bolts) for mounting auxiliary components like left side steps, tool boxes, or auxiliary light brackets. The bracket’s main body has a 95° angled structure (with a 5mm-thick vertical plate and 4.5mm-thick horizontal plate) that accommodates both vertical and horizontal component installation, while a 18mm-deep recessed area on the contact surface provides space for a rubber gasket (included) to prevent component slippage and reduce vibration transfer. Unlike single-purpose brackets that limit application, this multi-functional design reduces the need for multiple bracket types, simplifying inventory management for fleet operators

Designed to resist corrosion from road salt, mud, and moisture (critical for left-side underbody or exterior-mounted brackets), the bracket undergoes a three-stage anti-corrosion treatment. First, a zinc phosphate conversion coating (65μm thickness) creates a porous base to enhance coating adhesion. Next, an electrophoretic primer (85μm) is applied to form a uniform moisture barrier, followed by a thermosetting polyester topcoat (55μm, RAL 9005 black) that resists chipping, fading, and chemical damage from diesel or cleaning agents. This coating system passes 1,250 hours of neutral salt spray testing (equivalent to 10.5 years of road salt exposure) without rust or coating peeling. The mounting holes are also tapped with precision threads and coated with anti-seize compound to prevent thread corrosion, ensuring easy bolt removal during maintenance or component replacement

Designed for hassle-free replacement by fleet technicians or DIY owners, the bracket simplifies installation with precision-machined features and a complete hardware kit. All mounting holes are drilled with H9 tolerance (ensuring perfect bolt fit) and deburred to avoid damaging bolt threads or component surfaces. Two laser-etched alignment marks on the bracket’s surface line up with reference points on the Dongfeng KR’s left chassis frame, eliminating guesswork and reducing installation time by 40% (typically 16–22 minutes). The package includes 4 M12×32mm high-tensile bolts, 4 M10×25mm bolts, lock washers, a rubber anti-slip gasket, and a torque guide (specifying 95 N·m for M12 bolts, 65 N·m for M10 bolts). Installation steps are straightforward: clean the frame mounting surface, align the bracket’s marks with the chassis reference points, secure the bolts to the specified torque, and attach the target component. Each unit undergoes dimensional verification via CMM, load testing, and coating adhesion checks, backed by a 36-month warranty against defects (e.g., bending, cracking, or coating failure)