Abstract: An improved pulling head is provided for setting blinds fasteners, such as by pulling the setting pin of a blind rivet or the like, wherein the pulling head is rapidly and easily adjustable for use with blind fasteners of different sizes or types. The improved pulling head comprises an elongated support housing carrying a sliding draw bolt assembly for grasping and pulling a setting pin inserted into a nose end of the support housing through a selected one of a plurality of head inserts of selected different sizes or types. The head inserts are carried by a generally cone-shaped turret cap mounted at the support housing nose end for rotation about an axis offset from the direction of sliding draw bolt assembly movement thereby permitting the selected head insert to be rotated to an operative position in front of the draw bolt assembly and the remaining nonselected head inserts to be stationed in inoperative positions spaced from contact with the structure being fastened.

Abstract: A blind rivet with a deformable annular clamping ridge around the leading end of the expansion section of the setting pin, with a tapered leading face and a crest diameter a few thousandths of an inch larger than the inside diameter to which the sleeve of the rivet is to be expanded, thereby to provide a high momentary clamping force against the workpieces to be riveted, greater bearing area as a result of the greater initial effective diameter, and a better hole filling because of the excess material provided by the ridge. The ridge may be of the same material as the remainder of the head, to be deformed as an incident to wire-drawing elongation of the head, or may be a soft-coating applied to a harder core material.