A-B1771009-AI PUSHNUTOne New Aftermarket Replacement Pushnut Fits Briggs and Stratton (Fits Briggs & Fits Stratton) Engines This 5 8 inch pushnut is a push on fastener used to secure components within Fits Briggs and Stratton engine assemblies. Pushnuts press onto a stud or shaft and hold firmly without threads, making them a common hardware item in lawn and garden equipment powered by Fits Briggs and Stratton engines. This aftermarket replacement is a direct substitute