Features 1、Similar to countersunk head screws, the head is embedded in the machine parts, and the connection strength is relatively large. However, it is necessary to install and remove the screws with the corresponding specifications of hex wrench. 2、Generally used for all kinds of machine tools and accessories. 3、Well packed and assorted in a resealable transparent box for convenient storage and carry. 4、There are various common sizes for general purpose use. 5、Made from Stainless steel material for durability Specification Features: Similar to countersunk head screws, the head is embedded in the machine parts, and the connection strength is relatively large. However, it is necessary to install and remove the screws with the corresponding specifications of hex wrench. Generally used for all kinds of machine tools and accessories. Well packed and assorted in a resealable transparent box for convenient storage and carry. There are various common sizes for general purpose use. Made from Stainless steel material for durability Specification: Standard:British system, American system Size: #6-32*3/16 #6-32*1/4 #6-32*5/16 #6-32*3/8 #6-32*1/2 #6-32*5/8 #6-32*3/4 #6-32*7/8 #6-32 nut Weight: Approx.290g/10.2oz Package list: 1 x 290pcs/box Pan Head Screw Package List