The Peterson drive spud ball (1/4-28) is a retention-style fastener used with pulley systems to prime or secure dry sump oil pump components. Offered in a ball-end retention style and supplied with the retaining washer in typical kits, this fastener provides a straightforward method to engage pulley retention hardware where a 1/4-28 thread is specified.
Peterson Fluid Systems Drive Spud Ball 1/4-28