3a thread class right-hand 2.192" overall length 13 thread quantity per inch length - 2.192 in plus/minus.020; 45 degree chamfer both ends plus/minus .030 to .005; material - nickel, copper unc thread series
2a thread class right-hand 2.000" overall length 16 thread quantity per inch gray metallic-ceramic coating per mil-c-81751, ty 1 cl 4 unc thread series