Retractable and reusable self-locking fastener

摘要: A retractable and reusable self-locking fastening device in the form of a commercially available rivet, pin, threaded bolt or stud like for insertion into sized clearance hole workpiece includes shank means having tenon pilot which comprises two successive steps lesser diameter formed on at least one end means. Mounted fixedly connected to is lug generally truncated conical shape with closed remote therefrom being opened define space disposed, aperture enable be The tapered walls have four outwardly extending movable sections separated by longitudinal slots defining cone configuration. made from any suitable material possesses sufficient resiliency permit compressed during fastener secured fastened. as above described may inwardly means, provides nut operative secure workpieces against fixed shoulder prevent said turning off fastener.