Shell Configuration: Straight Plug Shell Size * - Select -10121416182022248 Please select your shell size first in order to continue. Class * - Select -E Environmental, with Grommet Nut. May or may not have teeth on rear of shell. Current for MS27499, MS27508 and MS27513. P Potting, includes potting boot and short rear grommet. Inactive for new Air Force design. T Environmental, with teeth on rear of shell, less rear grommet nut. Insert Arrangement * - Select -4581516181926303235394161979899 Contact Type * - Select -A Connector less pin contactsB Connector less socket contacts Polarization * - Select -A B C D N Normal Material & Finish * - Select -A Aluminum, Bright or Gold Cadmium over Nickel B Aluminum, Olive Drab Cadmium over Nickel C Aluminum, Non-Conductive Anodize F Aluminum, Electroless Nickel N Stainless Steel, Electrodeposited Nickel