PRODUCT SPECIFICATIONS Part #: 0000-109129 Fastener Type: Machine Screw Phillips Pan Head Size Description: 1/4 -20 x 1/2 (FT) Diameter/Nominal Size: 1/4 Length: 1/2 Thread Pitch: 20 Thread Pitch Type: Coarse Thread Direction: Right Thread Coverage: Full System of Measurement: Inch Material: Stainless Steel 18-8 Finish: Plain Finish (No Plating) Head Type: Pan Drive Type: Phillips Average Piece Weight: 0.0109200 lbs. Machine screws have a uniform diameter the entire length of the shaft as opposed to tapered screws which have a pointed tip; are primarily used to fasten machine components appliances and many more.