Value Collection 011539P Hex Socket Cap Screw 1-8 Unc

Product Description

The VALUE COLLECTION 011539P is a hex socket cap screw designed for high-strength bolted assemblies requiring a compact, recessed drive head. Manufactured from alloy steel with a black oxide finish, this fastener meets ASME/ANSI B18.3 and ASTM A574 standards. The 1-8 UNC thread size and 4-inch length under head make it suitable for heavy-duty structural and mechanical connections. The 3/4-inch hex drive accommodates standard hex keys and Allen wrenches found in most trade toolkits. Black oxide coating provides moderate corrosion resistance and reduces light reflection in finished assemblies.

This cap screw is used in industrial machinery, structural steel fabrication, heavy equipment assembly, and mechanical maintenance applications where a flush or recessed fastener head is required. The partially threaded shank provides a bearing surface that resists shear loads in bolted joints. It is commonly installed by millwrights, maintenance mechanics, and pipefitters working on equipment frames, brackets, and mounting assemblies.

Key Features

• 1-8 UNC thread — coarse thread series for reliable engagement in steel tapped holes
• 4-inch length under head with partial threading for shear-resistant bolted joints
• Alloy steel construction meets ASTM A574 high-strength socket screw requirements
• Black oxide finish for moderate corrosion resistance and low-glare appearance
• 3/4-inch hex socket drive for use with standard hex keys
• Meets ASME/ANSI B18.3 dimensional standards for socket head cap screws

Compatibility

Designed as a standard 1-8 UNC hex socket cap screw for use in any tapped hole or nut conforming to 1-8 UNC thread specifications per ASME/ANSI B18.3.

Installation Notes

Installation requires a calibrated torque wrench with a 3/4-inch hex bit to achieve proper clamp load without overdriving. Always verify the mating tapped hole thread class and depth before installation. Follow applicable fastener torque guidelines from ASME or equipment OEM documentation. Inspect the screw for thread damage before use and discard any fastener with deformed threads or drive recess.