Home Hardware & Fasteners Machine Screws Phillips Head Machine Screws – Flat Head (1/4-20 x 1”) Marine Fasteners Inc Phillips Head Machine Screws – Flat Head (1/4-20 x 1”) $31.19 Phillips Head Machine Screws – Flat Head (1/4-20 x 1”) quantity Add to cart Product Details Product Details 1/4-20 x 1″. Stainless steel. Sold in boxes of 100 only.