Value Collection C89670 Hex Head Cap Screw 3/4-16 Grade 8

Product Description

The VALUE COLLECTION C89670 is a fully threaded hex head cap screw built to Grade 8 steel specifications with a zinc yellow dichromate finish. It carries a 3/4-16 UNF thread and measures 1-3/4 inches under the head, making it a high-strength fastener suited for heavy-duty mechanical and structural assemblies. Grade 8 steel delivers a higher tensile and proof load rating than Grades 2 or 5, and the zinc yellow dichromate coating provides corrosion resistance in moderately demanding environments. Manufactured to ASME B18.2.1 dimensional standards, this screw meets the tolerances required for precision bolted joints. Installation is straightforward for qualified mechanics, millwrights, machinists, and maintenance technicians working on industrial equipment, agricultural machinery, or automotive and fleet applications.

This fastener is appropriate for use in inch-system assemblies requiring a fine-thread, high-strength cap screw. The 3/4-16 UNF thread profile provides finer thread engagement than its UNC counterpart, which is useful where vibration resistance or precise torque control is needed. Typical applications include heavy equipment frames, hydraulic component mounting, powertrain assemblies, and structural steel connections where Grade 8 minimum strength is specified by the engineer of record. The fully threaded shank maximizes thread engagement across a range of joint thicknesses.

Key Features

• Grade 8 steel construction for high tensile, proof load, and yield strength requirements
• 3/4-16 UNF fully threaded shank - fine thread for improved vibration resistance and torque control
• Zinc yellow dichromate finish provides moderate corrosion protection and is visually distinct from lower-grade fasteners
• 1-3/4 inch length measured under head per ASME B18.2.1 dimensional standard
• Inch system (SAE) measurement - direct replacement for standard 3/4-16 Grade 8 hex cap screws
• Meets ASME B18.2.1 for consistent dimensional tolerances across head height, width across flats, and thread form

Compatibility

Designed as a standard inch-system hex head cap screw for any assembly specifying a 3/4-16 UNF Grade 8 fastener per ASME B18.2.1.

Installation Notes

Installation is performed by mechanics, millwrights, or maintenance technicians using standard hex wrenches or impact tools sized for a 3/4-inch hex cap screw. Always consult the equipment manufacturer or engineering specification for the required torque value before tightening - do not apply a generic torque without verifying the joint design. De-energize, depressurize, or otherwise render safe any assembly before replacing fasteners in service. Inspect threads on both the fastener and the mating nut or tapped hole for damage or contamination before installation.