Value Collection D39178 Hex Head Cap Screw 3/4-10 X 3.5 in

Product Description

The VALUE COLLECTION D39178 is a Grade 8 steel hex head cap screw with a 3/4-10 UNC thread size and a 3-1/2 inch length under head. It is partially threaded and finished with a zinc yellow dichromate coating that provides corrosion resistance in demanding service environments. Manufactured to ASME B18.2.1 standards, this fastener is suited for structural and mechanical assemblies where high tensile strength and dimensional consistency are required. Licensed mechanics, millwrights, pipefitters, and industrial maintenance technicians are the typical installers for hardware of this type.

This cap screw is used in heavy-duty bolted connections across industrial, commercial, and mechanical trade applications. The Grade 8 rating indicates a high-strength fastener appropriate for load-bearing joints, equipment mounting, and structural steel connections. Its partial threading is standard for longer-grip applications where the unthreaded shank needs to pass through a clearance hole before engaging the nut or tapped bore. Minimum order quantity is 10 pieces; each package contains 1 piece.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 3/4-10 UNC thread form per ASME B18.2.1 standard
• Partially threaded shank for proper grip in clearance-hole applications
• Zinc yellow dichromate finish for added corrosion resistance
• Length under head: 3-1/2 inches, measured per ASME standard convention
• UNSPSC Code 31161501 for procurement and catalog classification

Compatibility

Designed for use in standard 3/4-10 UNC tapped holes and with matching 3/4-10 hex nuts in inch-measurement bolted assemblies conforming to ASME B18.2.1.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician familiar with high-strength fastener torque requirements. Always confirm the mating thread, hole clearance, and material compatibility before installation. Do not mix Grade 8 fasteners with lower-grade nuts or tapped materials that cannot support the corresponding clamp load. Follow applicable industry standards and equipment manufacturer specifications for final torque values.