(75) Bulloni a flangia esagonali seghettati grado 5 1/4-20x1/2 e (75) dadi a flangia serr 1/4-20
1/4-20x1/2 Hex Flange Bolts Grade 5 Serrated - Zinc Plated - Full Thread. 1/4-20 Serrated Hex Flange Nuts - Zinc Plated. These are not second quality fasteners that were previously rejected or rescued from a scrap yard.