Product Description Specifications Made from hardened steel, these locators use an inboard locating shoulder to center the seat and hold the spring in place. The 4693 seat's 1.300" OD works well with our 26981 beehive valve springs in .570" OD guide applications. Category: Engine Components>Valve Springs, Retainers Core: N LTL: N MPN: 4693-16 Proposition 65: Y Special Order: Y