Value Collection HC1XX20160 Hex Cap Screw M20 Grade 316

Product Description

The VALUE COLLECTION HC1XX20160 is a metric hex head cap screw designed for applications that require corrosion-resistant fastening in demanding environments. Manufactured from Grade 316 austenitic stainless steel meeting the A4 material classification, this fastener resists oxidation, chemical exposure, and marine-grade moisture. The screw measures M20 x 2.50 thread pitch with a 160 mm length under head and features partial threading in conformance with DIN 931. The 30 mm hex drive size accommodates standard metric wrenching. Licensed tradespeople, millwrights, pipefitters, and mechanical contractors typically specify this grade of fastener where standard carbon steel hardware is unsuitable.

This fastener is suited for use in marine, chemical processing, food service, and outdoor structural applications where Grade 316 stainless steel is required for its elevated chloride resistance compared to Grade 304. The partially threaded shank makes it appropriate for bolted joint assemblies requiring a grip section, such as flanged connections, structural steel attachments, and machinery mounting. It conforms to DIN 931, the German Institute for Standardization specification governing partially threaded metric hex bolts.

Key Features

• Grade 316 austenitic stainless steel, A4 material classification for superior corrosion resistance
• Partial threading per DIN 931 provides a full grip section along the shank
• M20 x 2.50 thread pitch with 160 mm length under head
• 30 mm hex drive compatible with standard metric wrenching tools
• Bright uncoated finish maintains dimensional accuracy and avoids coating thickness variation
• Metric thread standard for use in metric-dimensioned assemblies

Compatibility

Designed as a DIN 931-compliant partially threaded metric hex bolt for use in M20 metric-threaded assemblies requiring Grade 316 stainless steel fasteners.

Installation Notes

Installation should be performed by qualified mechanical or structural tradespeople familiar with metric fastener specifications. Use a calibrated torque wrench sized for the 30 mm hex drive and apply torque values per applicable engineering specifications for the joint material and loading requirements. Avoid mixing stainless steel fasteners with dissimilar metals in submerged or high-humidity environments to reduce galvanic corrosion risk. Do not use impact tools at full torque on stainless fasteners, as galling of the threads can occur.