Value Collection 011557BR Hex Socket Cap Screw 1-1/4-7 Unc

Product Description

The VALUE COLLECTION 011557BR is a hex socket cap screw designed for high-strength fastening in industrial and mechanical assemblies. It features a 1-1/4-7 UNC thread size, a 3-inch length under head, and a 7/8-inch hex drive. Constructed from alloy steel with a black oxide coating, this fastener delivers solid corrosion resistance and surface hardness. The fully threaded shank provides consistent clamping force along the entire engaged length. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for structural and load-bearing applications where dimensional accuracy and material strength are required.

This screw is suited for heavy-duty mechanical assemblies, machinery mounting, fixture construction, and industrial equipment maintenance. The 7/8-inch internal hex drive accepts a standard hex key or Allen driver, allowing installation in recessed or tight-clearance applications. The coarse 7 TPI thread pitch is appropriate for general structural use in steel, cast iron, and similar substrates. Installers in manufacturing, millwright, and general industrial maintenance work will encounter this fastener regularly in equipment builds and field repairs.

Key Features

• 1-1/4-7 UNC coarse thread for reliable engagement in structural applications
• Fully threaded shank provides maximum thread engagement over the 3-inch length under head
• 7/8-inch hex socket drive for installation with a standard hex key or driver bit
• Alloy steel construction meets ASTM A574 mechanical property requirements
• Black oxide finish provides mild corrosion resistance and reduces surface glare
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in industrial and mechanical assemblies requiring a 1-1/4-7 UNC coarse thread fastener.

Installation Notes

Installation is typically performed by millwrights, machinists, or maintenance mechanics using a 7/8-inch hex key or socket driver. Ensure the mating tapped hole is clean and free of debris before threading. Do not exceed the rated proof load of the fastener; consult ASTM A574 torque guidelines for the appropriate tightening value. Apply thread lubricant or anti-seize compound when specified by the equipment manufacturer to prevent galling on the alloy steel threads.