Description: PS Cylinder Bracket Frame Insert Rivet Nut
Year: 1965-70
Model: Mustang, Cougar, Shelby, Ford
Model Options: Power steering
Engine: All
Transmission Type: All
Factory: San Jose, Dearborn, Metuchen
Hardware #: 375474-S RIVNUT 
Thread Size: 3/8-16
Specifications: 4.65 Hex x .81 L Body .70 Flange
Quantity: 1 (2 required)
Finish: S-100 

Accuracy Rating: 10
Best Repro Available: YES

Jack's Comments:

This is the rivet nut also known a a crush nut that inserts into the frame for the power steering ram frame bracket.

Its also the same rivet nut used for the clutch z-bar frame bracket.  See assembly manuals for locations.