58058 ALLEN TOOLS
INDIVIDUAL 4-MM METRIC LONG ARM HEX KEY-ALL58058 >
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INDIVIDUAL 4-MM METRIC LONG ARM HEX KEY-ALL58058 >
The reference number 550158 is most commonly associated with Spicer Drivetrain components, such as driveshaft dust caps, yoke seals, or support bearing seals (often under related part numbers like 211158X). Alternatively, if you are looking at standard radial oil seals, it can cross-reference to specific shaft sizes from manufacturers like SKF. To narrow down exactly what you need, it helps to know the application, the equipment or vehicle it is attached to, and whether you are replacing a drive shaft seal, bearing seal, or hydraulic component.
