Value Collection -30170-41/2 Hex Cap Screw 1-8x4.5in Grade 5

Product Description

The VALUE COLLECTION -30170-41/2 is a partially threaded hex head cap screw designed for general industrial and mechanical fastening applications. It is manufactured from Grade 5 steel with a zinc-plated finish that provides corrosion resistance in standard service environments. The screw follows the Unified National Coarse (UNC) thread standard with a 1-8 thread size and measures 4.5 inches under the head. Machinists, maintenance technicians, and trade professionals install this fastener where a high-strength, coarse-thread bolt with a partially unthreaded shank is required for proper load distribution or shear strength.

This hex head cap screw is suited for structural and mechanical assemblies in residential and commercial construction, HVAC equipment mounting, plumbing support structures, electrical panel installations, and general equipment fabrication. The partial threading leaves a smooth shank section that resists shear loads and allows the fastener to act as a locating pin in close-tolerance applications. It is sold in packages of 16 units, making it practical for single-trade jobs or small-batch repairs.

Key Features

• Grade 5 steel construction delivers medium-to-high tensile strength suitable for structural fastening
• Zinc-plated finish provides baseline corrosion resistance for indoor and sheltered outdoor use
• Partially threaded shank reduces shear stress at the joint interface
• UNC 1-8 thread standard ensures broad compatibility with standard hex nuts and tapped holes
• 4.5-inch length under head accommodates thicker material stacks and deep-clearance assemblies
• Package quantity of 16 supports single-job use without excess inventory

Compatibility

Designed as a standard UNC hex head cap screw compatible with any 1-8 threaded hex nut, coupler, or tapped hole conforming to Unified National Coarse thread specifications in the inch measurement system.

Installation Notes

Installation is performed by machinists, millwrights, or trade technicians using a standard hex wrench or socket set sized for a 1-inch nominal bolt head. Torque the fastener to values appropriate for Grade 5 hardware per ASME or applicable industry standards for the joint material and lubrication condition. Do not substitute a coarse-thread nut on this fastener without confirming 1-8 UNC compatibility. Ensure mating threads are clean and free of debris before installation to avoid galling the zinc finish.