4 PCS Oar Lock Socket Insert -1/2″ Oarlock Bushing -Nylon Oar Sleeve for Oar Posted on July 14, 2026 The bushing will fit perfectly for the oarlock horns in your boat. (3)Durable material: It is made of nylon, the outside of the oarlock bushing has many thread ring, provides long wear, won’t slip or slide.