A fastener system for multi-piece swage type fasteners, including a pin (12) and a collar (14), and providing a stump type fastener (10) constructed to be set as a pull type fastener with the fastener pin (12) having a threaded gripping portion (34) and including a compact installation tool (44) having a swage anvil (50) and a rotary threaded member (46) adapted to be threaded onto the threaded pull portion (34) of the pin (12) whereby a relative axial force is applied between the pin (12) and the collar (14) via the rotary threaded member (46) and swage anvil (50) to cause the anvil (50) to radially overengage the collar (14) to swage it into locking grooves (32) on the pin (12) and the pull portion (34) remaining on the pin (12) after installation and with the swage anvil (50) being connected to a piston rod (104) of a piston (80) for axially reciprocating movement for swaging the collar (14) with the rotary threaded member (46) being axially fixed and with the swage anvil (50) and rotary threaded member (46) being offset from the remainder of the tool (44) whereby the tool (44) can be used to install such fastener (10) in application of limited clearance.