Value Collection 015513BR Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION 015513BR is a hex socket cap screw engineered for high-strength fastening in demanding mechanical and structural applications. It carries a 7/8-9 UNC thread profile and measures 5 inches in length under the head, with partial threading along the shank. The drive is a 3/4-inch internal hex (Allen) socket. Constructed from alloy steel with a black oxide finish, it delivers solid corrosion resistance and the tensile strength required for heavy-duty bolted joints. This fastener meets ASME/ANSI B18.3, ASTM A574, and IFI 124 standards, making it suitable for precision-fit assemblies where torque retention and dimensional consistency matter.

This screw is suited for industrial, commercial, and heavy mechanical applications where a flush or low-profile cap screw head is required. Typical uses include machinery frames, hydraulic component mounting, die and fixture assembly, and general structural bolting where UNC-threaded connections are specified. The partially threaded shank provides a bearing surface that can improve joint clamping in through-bolt configurations. Machinists, millwrights, maintenance technicians, and mechanical contractors are the primary installers.

Key Features

• 7/8-9 UNC thread for compatibility with standard inch-series tapped holes
• 5-inch length under head with partial threading for improved shank bearing in bolted joints
• 3/4-inch internal hex drive accepts standard Allen and hex-socket tooling
• Alloy steel construction meets ASTM A574 high-strength cap screw requirements
• Black oxide finish provides mild corrosion resistance and reduces galling during installation
• Conforms to ASME/ANSI B18.3 and IFI 124 dimensional standards

Compatibility

Designed as a standard replacement or new-installation fastener for any application specifying a 7/8-9 UNC hex socket cap screw per ASME/ANSI B18.3 dimensional requirements.

Installation Notes

Installation requires a 3/4-inch hex key or socket driver capable of handling the torque loads associated with 7/8-inch diameter alloy steel fasteners. Ensure the mating tapped hole is clean, properly sized to 7/8-9 UNC, and free of debris before threading. Apply thread lubricant or anti-seize compound as appropriate for the joint material and service environment. Follow applicable torque specifications from the equipment manufacturer or relevant standards such as ASME PCC-1 for bolted flange joints.