Value Collection 403280BR Hex Cap Screw 3/4-10 X 3-1/2 in Grade 2

Product Description

The VALUE COLLECTION 403280BR is a 3/4-10 UNC hex head cap screw measuring 3-1/2 inches under the head, manufactured from Grade 2 steel with a zinc-plated finish for basic corrosion resistance. The shank is partially threaded, which is standard for longer fasteners used in clamped joint applications where full thread engagement is not required. This fastener is driven with a 1-1/8-inch hex wrench or socket. It is a general-purpose industrial and structural screw suited for plumbers, electricians, HVAC mechanics, and general contractors working with steel structure, equipment frames, pipe hangers, and equipment mounting applications.

This screw is appropriate for light- to medium-duty bolted connections in residential and commercial construction and mechanical applications. Grade 2 steel meets ASTM A307 equivalency for general-purpose, non-critical structural use. The zinc plating provides surface protection in dry or mildly humid indoor environments. Typical use cases include equipment mounting brackets, electrical enclosure assembly, pipe hanger hardware, ductwork support framing, and general mechanical assembly where high-strength alloy fasteners are not required.

Key Features

• 3/4-10 UNC thread form — coarse thread for fast engagement and resistance to cross-threading
• 3-1/2-inch length under head with partial threading — allows grip in unthreaded shank for clamped-joint integrity
• Grade 2 steel construction — adequate for general-purpose, non-critical bolted connections
• Zinc-plated finish — provides basic corrosion protection for indoor and dry-environment use
• 1-1/8-inch hex drive — compatible with standard commercial socket sets and box wrenches
• Weighs approximately 0.54 pounds per unit

Compatibility

Designed as a general-purpose UNC hex head cap screw for use with standard 3/4-10 nuts, threaded inserts, and tapped holes in steel fabrication, equipment mounting, and mechanical assembly applications.

Installation Notes

Installation does not require a licensed trade but is commonly performed by HVAC technicians, plumbers, and electricians during equipment mounting and structural support work. Use a properly sized 1-1/8-inch socket or box wrench to drive the fastener — do not use an adjustable wrench on production installations, as rounding the hex is a common failure. Always use a compatible Grade 2 or stronger hex nut and washer, and verify that the base material and joint design are appropriate for a Grade 2 fastener before installation in structural applications. Follow applicable building codes and manufacturer torque guidelines for the connected equipment.