Value Collection 581903PR Hex Socket Cap Screw 9/16-12 Unc

Product Description

The VALUE COLLECTION 581903PR is a hex socket cap screw designed for high-strength bolted connections in demanding industrial and mechanical applications. Manufactured from alloy steel with a black oxide finish, this fastener measures 6.5 inches in length under the head and uses a 7/16-inch hex drive. The partial threading along the shank provides a grip zone suitable for through-bolt applications where shear load and clamping force are both critical. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it a recognized choice for structural and precision assembly work. Machinists, millwrights, and maintenance technicians regularly specify this style of cap screw for machinery, tooling fixtures, and structural steel connections.

This screw is suited for industrial machinery assembly, equipment fabrication, and maintenance repair operations requiring a reliable 9/16-12 UNC thread fastener. The black oxide coating provides mild corrosion resistance and reduces light reflection, which is useful in both shop and field environments. Partial threading is common in applications where an unthreaded shank must pass through a clearance hole before engaging a tapped bore, providing improved alignment and load distribution across the joint.

Key Features

• 9/16-12 UNC thread size for high-load bolted connections
• 6.5 inches length under head with partial threading for shank-clearance applications
• 7/16-inch hex socket drive for use with standard hex keys or socket drivers
• Alloy steel construction meets ASTM A574 high-strength fastener requirements
• Black oxide finish provides mild corrosion resistance and low-reflectance appearance
• Conforms to ASME/ANSI B18.3 dimensional standard

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any application requiring a 9/16-12 UNC partially threaded fastener with a 7/16-inch hex drive.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or maintenance technician using a properly sized 7/16-inch hex key or socket driver. Verify that the mating tapped hole is clean and free of debris before installation. Follow applicable torque specifications for ASTM A574 alloy steel fasteners as referenced in your application engineering standards. Always de-energize and lock out equipment before replacing or tightening fasteners on operating machinery.