Filters: 4-1/2" Zinc US Grade 5 20 1/4" Remove All

1/4"-20 x 4-1/2", Zinc plated grade 5, US

US Fasteners
Hex bolt

Hex bolts

Bolts with hexagonal heads and machine threads for use with a nut or in a tapped hole. Also known as hex cap screws or machine bolts.