5/16-18 x 3-1/2" Hex Head Cap Screw - Steel - Zinc Yellow - UNC - Grade 8 - USA, Pack of 50

Hex head cap screws have a hexagonal head and are uniformally threaded for use with a corresponding threaded nut or into a threaded tapped hole. Mainly used in repair or construction projects.

1/2-13 x 1-1/2" Hex Head Cap Screw - Grade 8 - Full Thread - UNC - Alloy Steel - Plain - Pkg of 25 Hex head cap screws have a hexagonal head and are uniformally threaded for use with a corresponding threaded nut or into a threaded tapped hole. Mainly used in repair or construction projects.

Grade 5 Hex Cap Screws are made from medium carbon steel and are used in applications where medium strength is necessary, typically those where controlled clamp force and high loads are required. These screws can be screwed into internally tapped holes or used with a nut. Grade 5 Hex Cap Screws should always be used with a hardened washer under the turned component. SAE J429 covers the material and performance requirements of Grade 5 Hex Cap Screws and ASME B18.2.1 covers the dimensional requirements.