Value Collection 581959BR Hex Socket Cap Screw 1-1/2-6 Unc

Product Description

The VALUE COLLECTION 581959BR is a heavy-duty hex socket cap screw designed for high-strength fastening applications in industrial, structural, and mechanical assemblies. Manufactured from alloy steel with a black oxide finish, this cap screw measures 13 inches in length under head and carries a 1-1/2-6 UNC thread form. It is partially threaded, which is standard for long-body cap screws of this size, allowing the unthreaded shank to bear shear loads. The 1-inch hex drive accepts a standard Allen or hex key socket and torques to the high clamp loads expected from ASME/ANSI B18.3 and ASTM A574 hardware. Machinists, millwrights, and mechanical contractors working on heavy equipment, fixtures, and structural frames are the primary installers.

This cap screw is suited for use in heavy industrial machinery, fabrication fixtures, structural steel assemblies, and large-format mechanical equipment where a high-strength 1-1/2-6 UNC fastener is specified. Partial threading on a 13-inch body makes it particularly appropriate for through-bolt and close-tolerance applications where the shank must pass through a clearance hole before engaging the tapped bore. It is sold individually, making it practical for replacement or low-quantity repair work.

Key Features

• 1-1/2-6 UNC thread form — coarse pitch suitable for high-load industrial fastening
• 13-inch length under head with partial threading for shear-load applications
• Alloy steel construction meets ASTM A574 high-strength requirements
• Black oxide finish provides moderate corrosion resistance and reduces light reflection in precision assemblies
• 1-inch hex socket drive accommodates standard industrial hex key and socket tools
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard ASME/ANSI B18.3 and ASTM A574 hex socket cap screw for any application specifying a 1-1/2-6 UNC partially threaded alloy steel cap screw with a 13-inch length under head.

Installation Notes

Installation should be performed by a qualified millwright, machinist, or mechanical contractor familiar with high-strength fastener torque requirements for this diameter and grade. Ensure the mating tapped hole is clean, properly sized for 1-1/2-6 UNC, and free of debris before installation. A calibrated torque wrench with a 1-inch hex socket is required to achieve proper clamp load without overloading the joint. De-energize and lock out all equipment before servicing any fastened assembly per applicable OSHA and facility lockout/tagout procedures.