Value Collection 581210BR Hex Socket Cap Screw 1-3/8-6 Unc

Product Description

The VALUE COLLECTION 581210BR is a partially threaded hex socket cap screw engineered for high-strength fastening applications in industrial and mechanical assemblies. Sized at 1-3/8-6 UNC with an 18-inch length under head, this fastener is driven with a 1-inch hex key and provides reliable clamping force in heavy-duty structural and machinery joints. The alloy steel construction delivers high tensile strength and resistance to shear loads. A black oxide coating offers mild corrosion resistance and reduced light reflection, making it suitable for both indoor and controlled-environment applications. Licensed tradespeople, machine builders, and maintenance mechanics are the primary installers.

This screw is suited for large-diameter fastening tasks in industrial machinery, heavy equipment, structural jigs, dies, molds, and fabricated steel assemblies. The partially threaded shank provides a smooth bearing surface through the clamped material and engages threads only in the tapped hole, which improves joint accuracy. The coarse 6 TPI UNC thread form offers strong engagement in steel tapped holes and resists cross-threading. Applications include press frames, conveyor systems, heavy fixtures, and similar large-format mechanical assemblies requiring controlled torque and precise clamp load.

Key Features

• Thread size 1-3/8-6 UNC for high-load coarse-thread engagement
• 18-inch length under head with partial threading for shank bearing surface
• Alloy steel construction for high tensile strength per ASTM A574
• Black oxide finish provides mild corrosion resistance and low reflectivity
• 1-inch hex drive compatible with standard hex keys and socket drivers
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any 1-3/8-6 UNC tapped hole requiring a partially threaded alloy steel fastener with a 1-inch internal hex drive.

Installation Notes

Installation requires a calibrated 1-inch hex key or socket driver; use of an impact driver is not recommended without torque verification. Power down and de-energize or depressurize any system before fastener removal or installation in live mechanical assemblies. Follow applicable ASME and OSHA guidelines for torque procedures on large-diameter fasteners in structural joints. Inspect tapped hole threads for damage or contamination before installation to ensure full thread engagement.