Value Collection 581911BR Hex Socket Cap Screw 1-1/4-12 Unf

Product Description

The VALUE COLLECTION 581911BR is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, tooling, and structural joints. It features a 1-1/4-12 UNF thread form with a 2.5-inch length under head and is fully threaded from head to tip. The 7/8-inch hex drive socket accepts a standard hex key or Allen driver. Manufactured from alloy steel with a black oxide coating, it delivers solid corrosion resistance in controlled environments. This screw conforms to ASME/ANSI B18.3 and ASTM A574, making it suitable for demanding industrial and maintenance applications where tensile strength and dimensional accuracy are critical.

This screw is used in industrial machinery, fixtures, dies, and structural assemblies where a low-profile, high-clamping-force fastener is required. The fine 12-thread-per-inch pitch provides strong thread engagement and is well suited for metal-to-metal joints, precision equipment frames, and applications where vibration resistance and controlled torque loading are priorities. It is installed by millwrights, machinists, maintenance technicians, and general contractors working with heavy mechanical systems.

Key Features

• 1-1/4-12 UNF fine thread for strong clamping force and vibration resistance
• 2.5-inch length under head, fully threaded for maximum engagement
• 7/8-inch hex drive socket compatible with standard hex keys and drivers
• Alloy steel construction meets ASTM A574 high-strength requirements
• Black oxide finish provides mild corrosion resistance in dry or lightly oiled environments
• Conforms to ASME/ANSI B18.3 for consistent dimensional standards

Compatibility

Designed as an OEM-style replacement or maintenance fastener for industrial machinery and structural assemblies requiring a 1-1/4-12 UNF hex socket cap screw per ASME/ANSI B18.3 specifications.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using a calibrated torque wrench with a 7/8-inch hex bit. Always clean and inspect mating threads before installation. Apply a thread lubricant or anti-seize compound appropriate for alloy steel fasteners when required by the assembly specification. De-energize and lock out all equipment before accessing fastener locations on live machinery.