Symmetry Machine Screws, 1/4"-20 x 1" Round Head Slotted with Nuts: * Machine screws * Round head, slotted * 7 pieces * Size: 1/4"-20 x 1" with nuts * Perfect for light metal fastening * Screws can be used with pre-threaded holes or with nuts * Use with flat washers when securing wood or other soft materials * Use with lock washers where a more secure connection is desired * Model# 4-5075