Value Collection HC1XX20120 Hex Cap Screw M20 Grade 316

Product Description

The VALUE COLLECTION HC1XX20120 is a metric hex head cap screw designed for fastening applications that demand corrosion resistance and structural reliability. Manufactured from Grade 316 austenitic stainless steel (A4), this fastener offers superior resistance to chlorides, saltwater, and acidic environments compared to standard 304 stainless. It features an M20 x 2.50 mm thread with a 120 mm length under head and is partially threaded per DIN 931, making it suitable for bolted connections where an unthreaded shank grip is required. The 30 mm hex drive accommodates standard metric wrenching tools.

This cap screw is used in industrial, marine, chemical processing, and heavy mechanical applications where standard carbon steel or lower-grade stainless fasteners are not adequate. Partially threaded construction makes it well suited for through-bolt applications, flange connections, and structural assemblies where the shank bears shear load. It is installed by millwrights, pipefitters, maintenance mechanics, and structural tradespeople working in corrosive or high-moisture environments.

Key Features

• Grade 316 austenitic stainless steel (A4) provides high resistance to corrosion, including saltwater and chloride exposure
• Partially threaded shank per DIN 931 allows shear-load-bearing grip length in bolted connections
• M20 x 2.50 mm metric thread conforms to standard metric thread pitch
• 30 mm hex head accommodates standard metric open-end, box, and socket wrenches
• Bright uncoated finish maintains dimensional precision and is compatible with stainless nuts and washers
• 120 mm length under head suits a range of flange thicknesses and structural panel stacks

Compatibility

Designed as a DIN 931-standard metric hex head cap screw for use with M20 x 2.50 mm metric hex nuts and corresponding flat or lock washers in any application requiring Grade 316 stainless fasteners.

Installation Notes

Installation should be performed by a qualified tradesperson using calibrated metric tooling sized for a 30 mm hex. Always de-energize, depressurize, or otherwise isolate the assembly before disassembling existing fasteners. Use appropriate thread lubricant or anti-seize rated for stainless steel to prevent galling during installation, as A4 stainless fasteners are susceptible to thread galling when run dry. Follow applicable torque specifications from your engineering documentation or relevant industry standards for M20 fasteners.