StarTech. com's PC Screw Kit offers a handy assortment of common PC fasteners for building, reparing, and maintaining computer systems. System builders who regularly assemble computer systems. Thread type: #6-32 x 0. 25", #6-32 x 0. 15", #4-40 x 0. 18", M3 x 0. 25". Offers 50 screws in each of 7 category types, for a total of 350 screws, as well as an assortment of standoffs. Warranty: 2 years limited. Green compliance certificate/Authority: RoHS. Computer users who perform their own computer hardware upgrades or installations. Includes 50 - #4-40 metal standoff, 50 - #4-40 x 1. 6 mm nut, 50 - #4-40 x 3/16", 50 - #4-40 x 6 mm nut, 50 - #6-32 to M3 metal standoff, 50 - #6-32 x 0. 25", 50 - #6-32 x 4 mm, 50 - M3 x 0. 25in, 50 - case fan screw. Exterior material: Plastic. Accessibility: Top loading. Technicians who perform computer hardware repairs/replacement. Keep a variety of common computer case screws in one location. Metal jackscrew standoffs #4-40, #6-32. Compatibility: For PC. Dimensions: 1. 3"(H) x 4. 2"(W) x 8. 2"(L). PCscrew kit offers 50 screws in each of 7 category types, for a total of 350 screws, as well as an assortment of standoffs.