Value Collection 015515BR Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION 015515BR is a hex socket cap screw designed for high-strength bolted assemblies requiring a recessed drive interface. Sized at 7/8-9 UNC with a 5-1/2-inch length under head, this fastener is partially threaded and accepts a 3/4-inch hex (Allen) key drive. It is manufactured from alloy steel and finished with a black oxide coating that provides mild corrosion resistance and reduces galling during installation. Licensed mechanics, millwrights, and maintenance technicians use this class of fastener in industrial machinery, structural fixtures, and equipment mounting applications where flush or countersunk socket drives are preferred over hex head styles.

This screw is suited for industrial and commercial applications where high tensile fasteners are specified. The 7/8-9 UNC coarse thread is a common pitch in heavy equipment, steel fabrication, and machinery assembly. The partial threading allows the smooth shank to bear shear loads, making it appropriate for precision-clearance fits in drilled and reamed holes. The black oxide finish is compatible with lightly oiled environments where minimal surface treatment is acceptable.

Key Features

• 7/8-9 UNC coarse thread for compatibility with standard tapped holes in steel and heavy-duty assemblies
• 5-1/2-inch length under head provides extended grip range for thick stack-up applications
• Partially threaded shank supports shear load transfer in precision-fit bores
• 3/4-inch hex socket drive allows high torque input with standard hex keys or socket tooling
• Alloy steel construction meets ASTM A574 and ASME/ANSI B18.3 standards for socket cap screws
• Black oxide coating reduces surface reflectivity and provides light corrosion resistance when used with oil or wax

Compatibility

Designed as an OEM-style and general-purpose replacement or new-installation socket cap screw for 7/8-9 UNC tapped hole applications in industrial machinery, structural steel, and equipment assemblies where ASME/ANSI B18.3 and ASTM A574 compliance is required.

Installation Notes

Installation is typically performed by licensed millwrights, machinists, or maintenance mechanics using a 3/4-inch hex key or T-handle socket driver. Verify thread engagement depth meets minimum requirements per the applicable mechanical or structural specification before torquing. Apply a compatible thread lubricant or anti-seize compound as required by the assembly specification to ensure accurate clamp load. Do not exceed the rated tensile strength of the fastener by over-torquing.