FORTRESS THREADED CAP 10-16K (ROCKWELL & AL-KO)

Fortress threaded oil cap designed for 10K–16K Rockwell and Al-Ko trailer axles

Provides a secure, leak-resistant seal to protect hub lubrication systems

Heavy-duty clear construction allows quick inspection of oil levels without removing the cap

Built for durability, resisting heat, debris, and road contaminants in heavy-duty applications