Kupo Nylon Locking Nut for 38 to 16

The Kupo KS-177 is a set of five steel-and-nylon hexagon locking nuts sized for a 3/8"-16 thread. The nylon insert resists vibration-induced loosening, making these a reliable spare for securing fasteners on lighting stands, clamps, and grip hardware where a connection needs to stay tight through a busy shoot.