THESE WILL FIT K0 THRU 82. THE C6HSA IS THE HOTTER OF THE TWO PLUGS. BOTH PLUS WILL WORK FINE IN THE 50'S AND 70'S

Thread Size: 10mm

Thread Pitch: 1.0mm

Seat Type: Gasket

Resistor: No

Reach: 12.7mm (1/2")

Hex Size: 5/8" (16mm)

Terminal Type: Threaded Stud

Overall Height: ISO

Gap: .028" (0.7mm)