Holo-krome 720004260 Hex Socket Cap Screw 1-1/4-7 Unc

Product Description

The HOLO-KROME 720004260 is a partially threaded hex socket cap screw designed for high-strength bolted connections in industrial and mechanical assemblies. It features a 1-1/4-7 UNC thread and measures 12 inches in length under the head. The 7/8 inch hex socket drive accepts a standard hex key or socket driver. Manufactured from alloy steel with a black oxide finish, this fastener delivers corrosion resistance and meets ASME B18.3 and ASTM A574 standards. It is well-suited for structural and heavy-duty fastening applications where precise torque and thread engagement are required.

This cap screw is used in heavy industrial machinery, structural steel assemblies, manufacturing equipment, and maintenance applications requiring a large-diameter, high-strength fastener. The coarse 7 UNC thread pitch provides reliable engagement in steel or alloy tapped holes. Partial threading along the shank allows for accurate alignment and load distribution in through-bolt and blind-hole configurations. Machinists, millwrights, and maintenance technicians commonly install this fastener in fabrication shops, processing plants, and equipment repair settings.

Key Features

• 1-1/4-7 UNC coarse thread for robust thread engagement in heavy steel assemblies
• 12 inch length under head accommodates deep through-bolt and structural applications
• Partially threaded shank improves alignment and distributes shear loads along the bolt body
• 7/8 inch hex socket drive compatible with standard hex keys and socket drivers
• Alloy steel construction with black oxide coating for corrosion resistance and reduced galling
• Meets ASME B18.3 and ASTM A574 fastener standards

Compatibility

Designed as an OEM-style replacement or direct-fit fastener for heavy industrial machinery and structural assemblies requiring a 1-1/4-7 UNC hex socket cap screw per ASME B18.3 specification.

Installation Notes

Installation is typically performed by millwrights, machinists, or maintenance technicians using a calibrated torque wrench and a 7/8 inch hex socket or hex key. De-energize and lock out all relevant equipment before beginning fastener installation or removal per applicable OSHA lockout/tagout procedures. Inspect the tapped hole for debris, damage, or misalignment before driving the fastener. Do not substitute thread lubricants or anti-seize compounds without verifying compatibility with the joint design and torque specification established by the equipment manufacturer.