3a 1st end thread class 24 1st end thread quantity per inch body, swivel mlg material 17-4 ph, h 1025.finish pass.mil-s-5002 1st end unjs 1st end thread series
2a 1st end bulkhead thread class 16 1st end thread quantity per inch ivd coat per mil-c-83488 cl 3, ty 2 with max thk of 0.0005, chromate treatment shall be after glass bead peening at a max peen pressure of 25psi un 3rd end thread series