Comparison : Item # DWG#OUT177, Trigon Negative with Hole and Counterbore, thickness 0.129 / 0.135 in
Item # DWG#U-5317, Trigon Negative with Hole and Counterbore, thickness 0.128 / 0.136 in
Item # P01800.150T, Trigon Negative with Hole and Counterbore, thickness 0.161 / 0.167 in
Item # P018002, Trigon Negative with Hole and Counterbore, thickness 0.129 / 0.135 in
Item # P02800, Trigon Negative with Hole and Counterbore, thickness 0.135 / 0.143 in