Value Collection R52000921 Square Head Bolt 1-8 Unc

Product Description

The VALUE COLLECTION R52000921 is a square head bolt designed for industrial and structural fastening applications. It features a 1-8 UNC thread size and a 7-inch length under head, making it suitable for heavy-duty clamping and bolted connections that require a wrench or pipe wrench on the head. Manufactured from Grade 2 steel with an uncoated finish, this bolt meets ANSI/ASME B18.2.1 dimensional standards. The square head profile provides high torque engagement in applications where a standard hex head may not be practical, such as timber framing, machinery mounting, and agricultural equipment.

This bolt is used in residential construction, commercial structural work, and general industrial maintenance where a 1-8 UNC coarse-thread fastener is specified. The square head allows positive wrench engagement in tight or awkward spaces and is a common choice for timber connections, framing hardware, and legacy equipment that calls out square head fasteners by specification. Sold individually.

Key Features

• 1-8 UNC coarse thread for broad compatibility with standard tapped holes and nuts
• 7-inch length under head accommodates thick material stacks
• Grade 2 steel construction provides adequate strength for general-purpose structural use
• Square head profile enables high-torque wrench engagement with a standard open-end or pipe wrench
• Uncoated finish suitable for painted, galvanized, or otherwise field-treated assemblies
• Meets ANSI/ASME B18.2.1 dimensional standard

Compatibility

Designed as an OEM-style replacement or direct-fit fastener for applications specifying a 1-8 UNC square head bolt per ANSI/ASME B18.2.1.

Installation Notes

Installation is performed by general contractors, millwrights, ironworkers, or maintenance mechanics depending on application. Use a properly sized open-end wrench or pipe wrench on the square head and a matching 1-inch nut and washer on the threaded end. Follow applicable structural or equipment torque specifications from the project drawings or equipment manual. Inspect threads for damage before installation and do not force a cross-threaded bolt.