The PGSB-5 is a snap-mount bushing from Essentra Components, made of black nylon 6/6. It features a 0.250" inner diameter, fits panel thicknesses from 0.79mm to 3.18mm, and requires a 0.375" panel cutout.
Heyco 2057 is a black nylon snap-in bushing designed for a 0.500" circular mounting hole and accommodates cables up to 0.250" diameter. It features UL94 V-2 flammability rating and operates from -18°C to 105°C.