Value Collection 581820BR Hex Socket Cap Screw 1-8 Unc

Product Description

The VALUE COLLECTION 581820BR is a hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. The screw features a 1-8 UNC thread size and measures 7.5 inches in length under the head, making it suitable for deep-engagement fastening in thick stock or stacked components. Drive type is hex socket at 3/4 inches, accommodating standard hex keys and socket-drive tools. Constructed from alloy steel with a black oxide finish, this fastener delivers solid tensile strength and moderate corrosion resistance in controlled environments. Installation is typically performed by machinists, millwrights, maintenance technicians, and mechanical contractors.

This cap screw is used across a wide range of industrial and mechanical applications including machinery mounting, equipment frames, structural fixtures, and tooling assemblies. The partially threaded shank allows precise bearing-load transfer and accurate axial alignment in bolted joints. The 1-8 UNC coarse thread profile offers reliable engagement in standard tapped holes and threaded inserts. The black oxide coating provides a low-reflectance surface and mild protection against oxidation during storage and service in dry or lightly oiled environments.

Key Features

• 1-8 UNC coarse thread for strong engagement in standard tapped holes
• 7.5 inches length under head for deep-stack or heavy-material fastening
• 3/4 inch hex socket drive compatible with standard hex keys and socket tooling
• Alloy steel construction provides high tensile and shear strength
• Black oxide finish delivers mild corrosion resistance and low-reflectance appearance
• Partially threaded shank for accurate load transfer and joint alignment
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as a standard 1-8 UNC hex socket cap screw suitable for use in any tapped hole or threaded assembly conforming to ASME/ANSI B18.3 and ASTM A574 specifications for alloy steel socket cap screws.

Installation Notes

Installation is performed using a 3/4 inch hex key or socket-drive tool rated for the applied torque. Ensure the mating tapped hole thread form and depth are clean and free of debris before driving the fastener. Follow applicable machinery safety lockout/tagout procedures before servicing any assembly. Do not exceed the rated tensile strength of the fastener by applying impact-drive methods without proper tooling.