Value Collection -30604-39 Hex Cap Screw 7/8-9 X 6 in 316 Ss

Product Description

The VALUE COLLECTION -30604-39 is a partially threaded hex head cap screw designed for demanding fastening applications where corrosion resistance is critical. Manufactured from Grade 316 stainless steel with an uncoated finish, this fastener measures 7/8-9 thread size with a 6-inch length under head, following the Unified National Coarse (UNC) thread standard. The partial threading allows for precise clamping load distribution across unthreaded shank sections, making it well suited for structural and industrial connections exposed to moisture, chemicals, or marine environments.

This hex head cap screw is commonly used in commercial and industrial installations including HVAC equipment mounting, plumbing system supports, pool and water treatment equipment, and general mechanical assemblies. The 316 stainless steel grade provides superior resistance to chlorides and acidic environments compared to standard 304 stainless, making it a preferred choice for coastal, chemical processing, and wet system applications. Trades including plumbers, HVAC technicians, and pipefitters regularly specify 316 stainless fasteners for corrosive service conditions.

Key Features

• Grade 316 stainless steel construction for enhanced corrosion resistance in chloride and chemical environments
• 7/8-9 UNC thread size with 6-inch length under head for deep engagement in thick structural members
• Partially threaded shank provides full bearing load across unthreaded section
• Uncoated finish maintains dimensional accuracy and allows field inspection of fastener condition
• Inch measurement system with standard UNC thread form for broad tool compatibility

Compatibility

Designed as a standard inch-series UNC hex head cap screw suitable for use with any 7/8-9 threaded nut or tapped hole conforming to Unified National Coarse thread specifications.

Installation Notes

Installation should be performed by a qualified mechanic, pipefitter, or tradesperson using a properly sized hex wrench or socket. Always ensure the mating nut or tapped hole is the correct 7/8-9 UNC thread specification before assembly. De-energize, depressurize, or shut off any connected system before replacing or installing structural fasteners. Avoid mixing stainless steel fasteners with carbon steel hardware to prevent galvanic corrosion at the joint.