Used on m110a2 howitzer. 3.875" center hole diameter attachment features 0.750 deep x 0.250-20unc-2b; attachment face has port 0.125-27np x 0.440 deep to 0.3125-24unf-3b x 1.130 deep x 0.190 c-to-c oxide retainer surface treated
Used on m110a2 howitzer. 3.640" center hole diameter attachment features 0.190-32unf-3b x 0.375 deep; port 0.125-27 npt x 0.38 deep to 0.3125-24unf-3b x 0.3125 deep to 2 holes 0.0625 dia x 0.1875 c-to-c through oxide retainer surface treated
