Value Collection 39112 Hex Head Cap Screw 1/2-13 X 3 in Grade 8

Product Description

The VALUE COLLECTION 39112 is a 1/2-13 UNC hex head cap screw manufactured from Grade 8 steel with a zinc yellow dichromate finish. Measuring 3 inches under the head with partial threading, this fastener is built for high-strength bolted joint applications where tensile load capacity and corrosion resistance are both required. Grade 8 steel meets the elevated proof load and tensile strength requirements demanded in structural, mechanical, and industrial assemblies. The zinc yellow dichromate coating provides a barrier against oxidation in moderate-exposure environments. Sold in packs of 25, this screw conforms to ASME B18.2.1 dimensional standards.

This cap screw is suited for use in heavy equipment, machinery frames, structural steel connections, and general industrial fabrication where a partially threaded shank is needed to bear shear loads through the grip length. The partial thread configuration ensures the unthreaded shank fills the hole bore for tighter joint integrity. Typical installers include millwrights, maintenance mechanics, ironworkers, and general contractors working in commercial and industrial settings. The 1/2-13 UNC thread pattern is one of the most common coarse-thread sizes in inch-series fastener applications.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 1/2-13 UNC coarse-thread pattern for broad tool and nut compatibility
• 3-inch length under head with partial threading for shear-bearing shank clearance
• Zinc yellow dichromate finish for corrosion resistance in moderate-exposure environments
• Conforms to ASME B18.2.1 dimensional standards for consistent fitment
• Pack of 25 units for job-lot stocking and reduced per-unit cost

Compatibility

Designed as a standard inch-series hex head cap screw for use with 1/2-13 UNC nuts, washers, and threaded inserts in structural and mechanical assemblies requiring Grade 8 tensile strength.

Installation Notes

Installation is typically performed by mechanics, millwrights, or ironworkers using a standard hex socket or open-end wrench sized for a 1/2-inch hex head cap screw. Always use a hardened flat washer under the head and under the nut when clamping softer base materials. Torque to the value specified by the joint designer or equipment OEM for the Grade 8 designation and lubrication condition used. Never reuse fasteners that have been torqued to yield or show signs of thread damage or corrosion under the coating.