Value Collection D39478 Hex Head Cap Screw 3/4-16

Product Description

The Value Collection D39478 is a 3/4-16 hex head cap screw designed for high-strength fastening applications. It measures 3-1/2 inches under the head and features partial threading along the shank. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, this fastener delivers the corrosion resistance and tensile strength required in demanding mechanical and structural assemblies. It conforms to ASME B18.2.1 standards, making it suitable for precision-critical work where fastener geometry must meet defined tolerances. Mechanical contractors, millwrights, and maintenance technicians rely on Grade 8 fasteners when joint integrity is non-negotiable.

This cap screw is used in heavy equipment assembly, industrial machinery maintenance, structural steel connections, and general mechanical work where a fine-thread (UNF), high-strength hex fastener is specified. The 3/4-16 fine thread designation provides greater thread engagement and improved clamping force compared to coarse-thread equivalents at the same nominal diameter, making it a common choice in precision-fit applications and vibration-prone environments. Sold individually per unit with a minimum order quantity of 10 pieces.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish provides corrosion and abrasion resistance
• Partial threading allows shouldered clamping and precise joint alignment
• 3/4-16 UNF thread form for improved thread engagement in fine-thread applications
• Conforms to ASME B18.2.1 dimensional standards
• 3-1/2 inch length under head accommodates thicker stack assemblies

Compatibility

Designed as a standard ASME B18.2.1 hex head cap screw suitable for any application requiring a 3/4-16 UNF, Grade 8, partially threaded fastener in inch-measurement systems.

Installation Notes

Installation should be performed by a qualified mechanic or technician familiar with high-strength fastener procedures. Always confirm mating thread condition and class of fit before installation. Lubrication requirements and torque specifications must be sourced from the applicable engineering or OEM documentation for the assembly being serviced, as they are not defined by this fastener alone. Do not substitute Grade 8 fasteners with lower-grade hardware in structural or load-bearing joints.