Swage lock fasteners

Abstract

A fastener includes a pin member, a swage collar, and a nut. The pin member includes a shank portion having first and second ends and a threaded portion including an external thread. The swage collar has first and second ends and is adapted to be installed on the pin member and swaged onto the external thread of the pin member. The second end of the swage collar is positioned distal from the first end of the pin member when the swage collar is installed on the pin member. The nut is adapted to be installed on the pin member and has first and second ends and an internal thread adapted to engage the external thread of the pin member. When the nut is installed on the pin member, the nut is adapted to engage the swage collar such that the swage collar is retained on the pin member before swaging.

What is claimed is: 
     
         1 . A fastener, comprising:
 a pin member including an elongated shank portion having a first end, a second end opposite the first end, and a threaded portion intermediate the first and second ends end and including an external thread;   a swage collar having a first end and a second end opposite the first end of the swage collar, the swage collar being adapted to be installed on the pin member and swaged onto the external thread of the pin member, the second end of the swage collar being positioned distal from the first end of the pin member when the swage collar is installed on the pin member; and   a nut adapted to be installed on the pin member and having a first end, a second end opposite the first end of the nut, and an internal thread adapted to engage threadedly the external thread of the pin member,   wherein when the nut is installed on the pin member, the first end of the nut is adapted to engage the second end of the swage collar such that the swage collar is retained on the pin member prior to the swage collar being swaged onto the pin member.   
     
     
         2 . The fastener of  claim 1 , wherein the external thread comprises a helical thread. 
     
     
         3 . The fastener of  claim 2 , wherein the threaded portion further comprises an annular groove positioned intermediate the first and second ends of the pin member. 
     
     
         4 . The fastener of  claim 3 , wherein a width of the annular groove is in the range of one times a pitch of the helical thread to two times a pitch of the helical thread. 
     
     
         5 . The fastener of  claim 1 , wherein the pin member includes a pull portion having at least one pull groove. 
     
     
         6 . The fastener of  claim 1 , wherein the swage collar further comprises an internal fit-up tab. 
     
     
         7 . The fastener of  claim 1 , wherein the nut is hexagonal in shape or square in shape. 
     
     
         8 . The fastener of  claim 1 , wherein the swage collar includes a flange. 
     
     
         9 . The fastener of  claim 8 , wherein the flange of the swage collar is cylindrical in shape or hexagonal in shape. 
     
     
         10 . The fastener of  claim 1 , wherein the internal thread of the nut extends from the first end of the nut to the second end of the nut. 
     
     
         11 . The fastener of  claim 1 , wherein the pin member comprises carbon steel. 
     
     
         12 . The fastener of  claim 11 , wherein the pin member comprises a bolt selected from the group consisting of a Grade 9 strength level bolt, a Class 12.9 strength level bolt, a Grade 2 strength level bolt, a Grade 5 strength level bolt, a Grade 8 strength level bolt, a Class 8.8 strength level bolt, and a Class 10.9 strength level bolt. 
     
     
         13 . The fastener of  claim 1 , wherein the swage collar comprises a material selected from the group consisting of low carbon steel, unannealed low carbon steel, annealed low carbon steel, medium carbon boron steel, 10B22 steel, medium carbon steel, and 1038 steel. 
     
     
         14 . The fastener of  claim 1 , wherein the nut comprises medium carbon alloy steel. 
     
     
         15 . The fastener of  claim 1 , wherein the pin member includes a head located at the first end of the elongated shank portion of the pin member.