This is the replacement pressure relief valve adjusting screw for Titan dry sump pumps including the FF1600 side mount and front mount pumps and the Standard and Series 2 pumps for FF2000 / Sports 2000.
Tech Tip: Oil sometimes leaks past the adjusting screw threads, particularly on the FF1600 pumps. A Stat-O-Seal (Part No. 3245-1/4) under the adjuster locknut can help reduce that leak.