The O-ring,7x1.7 is the most widely applied product in the FT500 1982 (C) E-8 OIL PUMP ( two times ).
Check out any of the seventeen E-8 Oil Pump components enlisted.
A sample from the products for the E-8 Oil Pump include: Bolt,hex 8x16, Screw,pan,5x8, Gear,starter Idle, Bolt,hex 6x28.