Replacement crimping insert for SN58B / 48B / 2549 terminal crimping pliers (model SN28B). Designed for openbarrel crimping of spring connectors and TAB terminals in sizes 2.8 mm and 4.8 mm, this insert restores precise, repeatable crimps for handheld crimper tools. Key benefits Restores factoryquality crimps: returns worn pliers to reliable performance for secure electrical and mechanical connections. Saves time and reduces rework: consistent crimp geometry minimizes failed crimps and the need to restrip or rework terminals. Directfit replacement: intended for use with SN58B, 48B and 2549 pliers and identified as SN28B, so installation is straightforward for compatible hand tools. Supports common TAB sizes: specifically matched to 2.8 mm and 4.8 mm TAB terminals and openbarrel spring connectors used in many electrical assemblies. Primary attributes Compatibility: SN58B / 48B / 2549 terminal crimping pliers; referenced as SN28B insert. Functionality: open barrel crimper insert designed for spring connectors and TAB terminals. Terminal sizes: optimized for TAB 2.8 mm and TAB 4.8 mm. Tool type: hand tool insert for terminal crimping pliers. How it solves common problems Worn or damaged crimp dies cause inconsistent crimps and poor electrical continuity. Replacing the insert restores the correct crimp profile and pressure, improving contact reliability. Using the correct insert for TAB 2.8 and 4.8 terminals reduces terminal deformation and heataffected areas compared with mismatched dies. Typical applications Automotive wiring harness and assembly where 2.8 mm and 4.8 mm TAB terminals are common. Appliance and equipment servicing for replacing or maintaining connectors on control boards and harnesses. Field maintenance and light manufacturing for