3/4-10 Flat Head Cap Screw

The 3/4"-10 Flat Head Cap Screw is a heavy-duty, flush-mount fastener engineered for structural and mechanical assemblies requiring both high clamping force and a smooth, snag-free finish. With its 82° countersunk flat head and internal hex socket drive, this screw provides precise torque application while ensuring a low-profile fit—ideal for safety-critical or clearance-limited installations.

Specifications

• Thread Size: 3/4"-10 (Unified National Coarse)

• Head Type: Flat head with 82° countersink and internal hex drive

• Drive Type: Hex socket (Allen)

• Length: Available in standard lengths (typically from 1" to 6")

• Material: High-strength alloy steel; also available in stainless steel, black oxide, or zinc-plated finishes

• Finish Options: Black oxide, plain, zinc-plated, or stainless

• Grade: Typically Grade 8 (alloy steel), or 18-8 / 316 stainless steel for corrosion resistance

Key Features

• Flush Countersunk Design: The flat head allows the screw to sit flush or below the surface, ideal for moving assemblies, smooth surfaces, and concealed fastenings.

• Exceptional Strength: With a large 3/4" diameter and coarse 10 TPI thread, this fastener delivers outstanding tensile and shear strength for heavy-duty applications.

• Secure Torque Control: The internal hex drive enables reliable, high-torque tightening with minimal risk of stripping, even under demanding conditions.

• Durable Finishes: Available in corrosion-resistant stainless steel and protective coatings for performance in harsh or outdoor environments.

• Precision Thread Fit: Machined to UNC standards for strong engagement with tapped holes or heavy-duty nuts.

Typical Applications

The 3/4"-10 Flat Head Cap Screw is ideal for high-load, flush-mounted assemblies in heavy industrial environments:

• Structural Steel Framing and Baseplates

• Heavy Machinery and Equipment Mounting

• Industrial Safety Covers and Access Panels

• Transportation and Off-Road Vehicle Fabrication

• Tooling Fixtures, Dies, and Press Assemblies

• Marine and Outdoor Installations (in stainless)