Value Collection 99178 Hex Head Cap Screw 3/4-10 X 3-1/2 in

Product Description

The VALUE COLLECTION 99178 is a 3/4-10 x 3-1/2 inch hex head cap screw manufactured from Grade 8 steel with an uncoated finish. Grade 8 steel provides high tensile strength, making this fastener appropriate for heavy-duty structural and mechanical applications where standard Grade 5 hardware is insufficient. The screw is partially threaded with a Unified National Coarse (UNC) thread form and conforms to ASME B18.2.1 dimensional standards. This cap screw is driven with a standard hex wrench or socket and is installed by mechanics, millwrights, and maintenance technicians working on industrial equipment, heavy machinery, and structural assemblies.

This fastener is suited for use in high-load bolted joints in industrial, construction, and OEM manufacturing environments. The partially threaded shank provides a bearing surface in the joint, which is preferred in applications where shear load transfer or precise bolt engagement is required. Sold in a package quantity of 25 with a minimum order quantity of 1 package, it is well suited for shop stock, maintenance bins, and job-site supply.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 3/4-10 UNC thread form for wide tool and nut compatibility
• 3-1/2 inch length under head for deep-reach bolted joint applications
• Partially threaded shank supports shear load transfer in structural joints
• Conforms to ASME B18.2.1 for consistent dimensional accuracy
• Uncoated finish — suitable for indoor use or where coating is applied after assembly

Compatibility

Designed as a standard-dimension ASME B18.2.1 hex head cap screw compatible with any 3/4-10 UNC hex nut or tapped hole meeting the same thread standard.

Installation Notes

Installation should be performed by a qualified mechanic or technician familiar with fastener torque requirements for Grade 8 hardware. Always consult applicable torque specifications from the equipment OEM or a recognized fastener standard before tightening. Clean and inspect mating threads prior to assembly. Use a hardened washer under the head when the joint material requires load distribution.