Pneumatic clamping fasteners are designed for quick change applications. Instant pneumatic clamping reduces setup time in multiple-parts holding and frequent changeover of machinery or fixture. The shaft pushes out the balls onto the tapered surface of the receptacle to provide clamping force. Spring clamping type clamps when air is released, and unclamps when air is supplied. Pneumatic clamping type clamps when air is supplied, and unclamps when air is released. The body is made from 303 stainless steel. The shaft is made from 420 stainless steel with an electroless nickel-plated finish, quenched and tempered. The balls are made from 304 stainless steel.