Value Collection A997221 Hex Head Cap Screw 5/8-11

Product Description

The VALUE COLLECTION A997221 is a partially threaded hex head cap screw designed for general mechanical and structural fastening applications. Manufactured from 18-8 stainless steel in an uncoated finish, this fastener offers solid corrosion resistance for indoor and outdoor installations. It features a 5/8-11 UNC thread size with a 3-3/4 inch length under head, making it suited for through-bolting and clamped joint assemblies where a bearing surface beneath the hex head is required. Installers in HVAC, plumbing, electrical, and general mechanical trades reach for 18-8 stainless fasteners when mild to moderate corrosion exposure is present.

This cap screw is applicable across a wide range of trade and industrial assemblies including equipment mounting, pipe support bracketing, panel attachment, and structural connections. The partial threading allows a smooth shank section to bear shear loads in bolted joints, which is a common requirement in equipment bases, flanged connections, and support structures. Sold in packages of 10, this fastener suits both single-job and small-stock replenishment needs for contractors and service technicians.

Key Features

• 5/8-11 UNC thread provides broad compatibility with standard inch-series nuts and tapped holes
• 3-3/4 inch length under head accommodates medium-depth clamped assemblies
• 18-8 stainless steel construction offers corrosion resistance in moist or mildly corrosive environments
• Partially threaded shank carries shear loads in bolted joint applications
• Uncoated finish eliminates coating thickness variation from threaded fit calculations
• Packaged in quantities of 10 for efficient field use or shop stocking

Compatibility

Designed as a standard inch-series hex head cap screw compatible with 5/8-11 UNC nuts, washers, and tapped holes conforming to standard UNC thread specifications.

Installation Notes

Installation is performed with a standard hex wrench or socket set sized for the appropriate hex drive. Ensure mating threads are clean and free of debris before installation. When torquing stainless steel fasteners, apply an anti-seize compound to reduce the risk of galling, which is common with stainless-to-stainless thread engagement. Follow applicable mechanical and structural codes for fastener torque and joint preload requirements.